Jump to content

List of WBO world champions

From Wikipedia, the free encyclopedia

This is a list of WBO world champions, showing every world champion certified by the World Boxing Organization (WBO). The WBO is one of the four major governing bodies in professional boxing, and has awarded world championships in 17 different weight classes since 1989.

Boxers who won the title but were stripped due to the title bout being overturned to a no contest are not listed.

Current champion
Most consecutive title defenses

Heavyweight

[edit]
No. Name Reign Defenses
1 Francesco Damiani
(def. Johnny du Plooy) 		6 May 1989 – 11 Jan 1991 1
2 Ray Mercer 11 Jan – 28 Dec 1991 1
Mercer was stripped of the title in December 1991 for signing for a bout against Larry Holmes instead of mandatory challenger Michael Moorer.[1]
3 Michael Moorer
(def. Bert Cooper) 		15 May 1992 – 8 Feb 1993 0
Moorer vacated the title so that he could be ranked by other sanctioning bodies.[2]
4 Tommy Morrison
(def. George Foreman) 		7 Jun – 29 Oct 1993 1
5 Michael Bentt 29 Oct 1993 – 19 Mar 1994 0
6 Herbie Hide 19 Mar 1994 – 11 Mar 1995 0
7 Riddick Bowe 11 Mar 1995 – 5 May 1996 1
Bowe was stripped of the title when he rejected Don King's purse offer.[3]
8 Henry Akinwande
(def. Jeremy Williams) 		29 Jun 1996 – 29 Jan 1997 2
Akinwande vacated the title at the request of the WBC to become the mandatory challenger of the upcoming fight between Lennox Lewis and Oliver McCall for the vacant belt.[4]
9 Herbie Hide (2)
(def. Tony Tucker) 		28 Jun 1997 – 26 Jun 1999 2
10 Vitali Klitschko 26 Jun 1999 – 1 Apr 2000 2
11 Chris Byrd 1 Apr – 14 Oct 2000 0
12 Wladimir Klitschko 14 Oct 2000 – 8 Mar 2003 5
13 Corrie Sanders 8 Mar – 7 Oct 2003 0
Sanders vacated the title to sign with Don King.[5]
14 Lamon Brewster
(def. Wladimir Klitschko) 		10 Apr 2004 – 1 Apr 2006 3
15 Siarhei Liakhovich 1 Apr – 4 Nov 2006 0
16 Shannon Briggs 4 Nov 2006 – 2 Jun 2007 0
17 Sultan Ibragimov 2 Jun 2007 – 23 Feb 2008 1
18 Wladimir Klitschko (2) 23 Feb 2008 – 28 Nov 2015 14
19 Tyson Fury 28 Nov 2015 – 12 Oct 2016 0
Fury, who had previously withdrawn from a rematch against Wladimir Klitschko before testing positive in a Voluntary Anti-Doping Association (VADA) test for cocaine on 29 September, vacated the title on 12 October 2016 after testing positive a second time, citing his need to focus on treatment for depression.[6]
20 Joseph Parker
(def. Andy Ruiz Jr.) 		10 Dec 2016 – 31 Mar 2018 2
21 Anthony Joshua 31 Mar 2018 – 1 Jun 2019 1
22 Andy Ruiz Jr. 1 Jun – 7 Dec 2019 0
23 Anthony Joshua (2) 7 Dec 2019 – 25 Sep 2021 1
24 Oleksandr Usyk 25 Sep 2021 – present 3

Junior heavyweight

[edit]

This weight class is designated as cruiserweight by the WBA, WBC, and IBF.

No. Name Reign Defenses
1 Boone Pultz
(def. Magne Havnå) 		3 Dec 1989 – 17 May 1990 0
2 Magne Havnå 17 May 1990 – 15 Feb 1991 2
Havnå vacates the title.
3 Tyrone Booze
(def. Derek Angol) 		25 Jul 1992 – 13 Feb 1993 1
4 Markus Bott 13 Feb – 26 Jun 1993 0
5 Nestor Hipolito Giovannini 26 Jun 1993 – 17 Dec 1994 1
6 Dariusz Michalczewski 17 Dec 1994 – Mar 1995 0
Michalczewski vacated the title in favor of the WBO light heavyweight title, which he already held.
7 Ralf Rocchigiani
(def. Carl Thompson) 		10 Jun 1995 – 4 Oct 1997 6
8 Carl Thompson 4 Oct 1997 – 27 Mar 1999 2
9 Johnny Nelson 27 Mar 1999 – 22 Sep 2006 13
Nelson retired after suffering a back injury during training camp for his bout against Enzo Maccarinelli.[7]
10 Enzo Maccarinelli
(interim champion promoted) 		22 Sep 2006 – 8 Mar 2008 4
11 David Haye 8 Mar – 14 Jul 2008 0
Haye vacates the title to move up to heavyweight.[8]
12 Victor Emilio Ramírez
(interim champion promoted) 		Feb – 5 Dec 2009 1
13 Marco Huck 5 Dec 2009 – 14 Aug 2015 13
14 Krzysztof Głowacki 14 Aug 2015 – 17 Sep 2016 1
15 Oleksandr Usyk 17 Sep 2016 – 5 Jun 2019 6
Usyk vacated the title to move up to heavyweight.[9]
16 Krzysztof Głowacki (2)
(interim champion promoted) 		5 Jun – 15 Jun 2019 0
17 Mairis Briedis 15 Jun – 25 Nov 2019 0
Briedis stripped of title for not agreeing on an immediate rematch with Głowacki.[10]
18 Lawrence Okolie
(def. Krzysztof Głowacki) 		20 Mar 2021 – 27 May 2023 3
19 Chris Billam-Smith 27 May 2023 – 16 Nov 2024 2
20 Gilberto Ramirez 16 Nov 2024 – present 0

Light heavyweight

[edit]
No. Name Reign Defenses
1 Michael Moorer
(def. Ramzi Hassan) 		3 Dec 1988 – 1991 9
Moorer vacated the title to move up to heavyweight.
2 Leeonzer Barber
(def. Tom Collins) 		9 May 1991 – 10 Sep 1994 4
3 Dariusz Michalczewski 10 Sep 1994 – 10 Oct 2003 23
4 Julio César González 10 Oct 2003 – 17 Jan 2004 0
5 Zsolt Erdei 17 Jan 2004 – 13 Nov 2009 11
Erdei vacated the title to move up to cruiserweight.[11]
6 Jürgen Brähmer
(interim champion promoted) 		13 Nov 2009 – 19 May 2011 2
Brähmer was stripped of the title after withdrawing from a bout against Nathan Cleverly, citing an eye injury.[12]
7 Nathan Cleverly
(interim champion promoted) 		19 May 2011 – 18 Aug 2013 5
8 Sergey Kovalev 18 Aug 2013 – 19 Nov 2016 8
9 Andre Ward 19 Nov 2016 – 21 Sep 2017 1
Ward retires.[13]
10 Sergey Kovalev (2)
(def. Vyacheslav Shabranskyy) 		25 Nov 2017 – 4 Aug 2018 1
11 Eleider Álvarez 4 Aug 2018 – 2 Feb 2019 0
12 Sergey Kovalev (3) 2 Feb – 2 Nov 2019 1
13 Canelo Álvarez 2 Nov – 17 Dec 2019 0
Álvarez vacated the title to move down to super middleweight.[14]
14 Joe Smith Jr.
(def. Maxim Vlasov) 		10 Apr 2021 – 18 Jun 2022 1
15 Artur Beterbiev 18 Jun 2022 – present 3

Super middleweight

[edit]
No. Name Reign Defenses
1 Thomas Hearns
(def. James Kinchen) 		4 Nov 1988 – 20 May 1991 2
Hearns's title was vacated on WBO's April 1991 ratings posted on 8 May.[15] He later moved up to light heavyweight.
2 Chris Eubank
(def. Michael Watson) 		21 Sep 1991 – 18 Mar 1995 14
3 Steve Collins 18 Mar 1995 – 2 Oct 1997 7
Collins was stripped of the title in October 1997 after suffering a leg injury during training camp and subsequently withdrawing from his bout against Joe Calzaghe.[16]
4 Joe Calzaghe
(def. Chris Eubank) 		11 Oct 1997 – 26 Sep 2008 21
Calzaghe, citing difficulty making weight, vacated the title after moving up to light heavyweight.[17]
5 Denis Inkin
(def. Fulgencio Zuniga) 		27 Sep 2008 – 10 Jan 2009 0
6 Károly Balzsay 10 Jan – 22 Aug 2009 1
7 Robert Stieglitz 22 Aug 2009 – 25 Aug 2012 6
8 Arthur Abraham 25 Aug 2012 – 23 Mar 2013 1
9 Robert Stieglitz (2) 23 Mar 2013 – 1 Mar 2014 2
10 Arthur Abraham (2) 1 Mar 2014 – 9 Apr 2016 5
11 Gilberto Ramírez 9 Apr 2016 – 13 May 2019 5
Ramírez vacates the title to move up to light heavyweight.[18]
12 Billy Joe Saunders
(def. Shefat Isufi) 		18 May 2019 – 8 May 2021 2
13 Canelo Álvarez 8 May 2021 – present 6

Middleweight

[edit]
No. Name Reign Defenses
1 Doug DeWitt
(def. Robbie Sims) 		18 Apr 1989 – 29 Apr 1990 1
2 Nigel Benn 29 Apr – 18 Nov 1990 1
3 Chris Eubank 18 Nov 1990 – 17 Jul 1991 3
Eubank was expected to move up to super middleweight,[19] the title was then reportedly vacated 1 day after.[20]
4 Gerald McClellan
(def. John Mugabi) 		20 Nov 1991 – 2 Apr 1993 0
McClellan vacated the title to move up to super middleweight.[21]
5 Chris Pyatt
(def. Sumbu Kalambay) 		19 May 1993 – 11 May 1994 2
6 Steve Collins 11 May 1994 – 22 Apr 1995 0
Collins vacated the title to stay super middleweight.[22]
7 Lonnie Bradley
(def. David Mendez) 		19 May 1995 – 7 Nov 1997 6
Rhodes and Grant was supposedly going to fight for the interim title because of Bradley's injury,[23] but was later changed to the vacant title.[24]
8 Otis Grant
(def. Ryan Rhodes) 		13 Dec 1997 – 14 Nov 1998 1
Grant vacated the title to move up to light heavyweight and challenge Roy Jones Jr.[25]
9 Bert Schenk
(def. Freeman Barr) 		30 Jan – 14 Jul 1999 1
Schenk vacated the title due to acute lumbago.[26]
10 Jason Matthews
(def. Ryan Rhodes) 		17 Jul – 27 Nov 1999 0
11 Armand Krajnc 27 Nov 1999 – 6 Apr 2002 3
Krajnc vacated the title on 4 June 2001, while in a dispute with Universum Box-Promotion. However the WBO unanimously voted on 17 September 2001 that Krajnc had remained WBO champion throughout the dispute.
12 Harry Simon 6 Apr 2002 – 8 Jul 2003 0
Simon was involved in a car accident[27] and was sidelined for 8 months resulting in being stripped of the title.[28]
13 Héctor Velazco
(interim champion promoted) 		8 Jul – 13 Sep 2003 0
14 Felix Sturm 13 Sep 2003 – 5 Jun 2004 1
15 Oscar De La Hoya 5 Jun – 18 Sep 2004 0
16 Bernard Hopkins 18 Sep 2004 – 16 Jul 2005 1
17 Jermain Taylor 16 Jul 2005 – 29 Sep 2007 3
18 Kelly Pavlik 29 Sep 2007 – 17 Apr 2010 3
19 Sergio Martínez 17 Apr – 29 May 2010 0
Martínez, who held the WBC junior middleweight title at that time, was stripped of the WBO middleweight title because he missed the WBO's deadline to decide on which weight class he would continue to fight in.[29]
20 Dmitry Pirog
(def. Daniel Jacobs) 		31 Jul 2010 – 25 Aug 2012 3
Pirog is stripped of title for choosing to fight Gennady Golovkin instead of mandatory challenger Hassan N'Dam N'Jikam.[30]
21 Hassan N'Dam N'Jikam
(interim champion promoted) 		25 Aug – 20 Oct 2012 0
22 Peter Quillin 20 Oct 2012 – 4 Sep 2014 3
Quillin vacated the title after pulling out of his scheduled bout against mandatory challenger Matt Korobov.[31]
23 Andy Lee
(def. Matt Korobov) 		13 Dec 2014 – 19 Dec 2015 0
24 Billy Joe Saunders 19 Dec 2015 – 11 Oct 2018 3
Saunders tested positive for the banned stimulant oxilofrine before his bout against mandatory challenger Demetrius Andrade and vacated the title citing his lack of time to appeal.[32]
25 Demetrius Andrade
(def. Walter Kautondokwa) 		20 Oct 2018 – 26 Aug 2022 5
Andrade vacated the title to move up to super middleweight.[33]
26 Janibek Alimkhanuly
(interim champion promoted) 		26 Aug 2022 – present 3

Junior middleweight

[edit]
No. Name Reign Defenses
1 John David Jackson
(def. Lupe Aquino) 		8 Dec 1988 – 17 Feb 1990 1
The title was vacated after an incorrect NC call in his bout against Martin Camara.[34]
2 John David Jackson (2)
(def. Chris Pyatt) 		23 Oct 1990 – 5 Aug 1993 3
Jackson vacated the title to move up to middleweight.[35]
3 Verno Phillips
(def. Lupe Aquino) 		30 Oct 1993 – 22 Nov 1995 4
4 Paul Jones 22 Nov 1995 – 26 Feb 1996 0
Jones was stripped of the title after withdrawing from a bout against no. 1 contender Bronco McKart.[36]
5 Bronco McKart
(def. Santos Cardona) 		1 Mar – 17 May 1996 0
6 Winky Wright 17 May 1996 – 22 Aug 1998 3
7 Harry Simon 22 Aug 1998 – 27 Nov 2001 4
Simon vacated the title to move up to middleweight.[37]
8 Daniel Santos
(def. Yori Boy Campas) 		16 Mar 2002 – 3 Dec 2005 4
9 Serhiy Dzyndzyruk 3 Dec 2005 – 5 Oct 2011 6
Dzindziruk was stripped of the title due to inactivity caused by injuries.[38]
10 Zaurbek Baysangurov
(interim champion promoted) 		5 Oct 2011 – 22 Jul 2013 2
Baysangurov was stripped of the title in July 2013 after withdrawing from a bout against mandatory challenger Demetrius Andrade.[39]
11 Demetrius Andrade
(def. Vanes Martirosyan) 		9 Nov 2013 – 31 Jul 2015 1
Andrade was stripped of the title due to inactivity.[40]
12 Liam Smith
(def. John Thompson) 		10 Oct 2015 – 17 Sep 2016 2
13 Canelo Álvarez 17 Sep 2016 – 21 May 2017 0
Álvarez intends to stay at middleweight. The title is vacated on WBO's May 2017 rankings.[41]
14 Miguel Cotto
(def. Yoshihiro Kamegai) 		26 Aug – 2 Dec 2017 0
15 Sadam Ali 2 Dec 2017 – 12 May 2018 0
16 Jaime Munguía 12 May 2018 – 23 Nov 2019 5
Munguia vacated the title to move up to middleweight.[42]
17 Patrick Teixeira
(interim champion promoted) 		4 Dec 2019 – 13 Feb 2021 0
18 Brian Castaño 13 Feb 2021 – 14 May 2022 1
19 Jermell Charlo 14 May 2022 – 30 Sep 2023 0
Charlo stripped of the title for fighting Canelo Álvarez instead of mandatory challenger Tim Tszyu.[43]
20 Tim Tszyu
(interim champion promoted) 		30 Sep 2023 – 30 Mar 2024 1
21 Sebastian Fundora 30 Mar 2024 – present 0

Welterweight

[edit]
No. Name Reign Defenses
1 Genaro León
(def. Danny Garcia) 		6 May – 28 Nov 1989 0
Léon's title was vacated on WBO's November 1989 ratings posted on 28 November.[44]
2 Manning Galloway
(def. Al Hamza) 		15 Dec 1989 – 12 Feb 1993 7
3 Gert Bo Jacobsen 12 Feb – 13 Oct 1993 0
Jacobsen was stripped of the title after withdrawing from a bout against Eamonn Loughran due to suffering from the flu.[45]
4 Eamonn Loughran
(def. Lorenzo Smith) 		16 Oct 1993 – 13 Apr 1996 5
5 José Luis López 13 Apr – 21 Nov 1996 1
López was stripped of the title after testing positive for marijuana.[46]
6 Mihai Leu
(def. Santiago Samaniego) 		22 Feb 1997 – 1997 1
Leu retires.
7 Akhmed Kotiev
(interim champion promoted) 		14 Feb 1998 – 6 May 2000 4
8 Daniel Santos 6 May 2000 – 5 Dec 2001 2
Santos vacated the title to move up to junior middleweight.[47]
9 Antonio Margarito
(def. Antonio Díaz) 		16 Mar 2002 – 14 Jul 2007 7
10 Paul Williams 14 Jul 2007 – 9 Feb 2008 0
11 Carlos Quintana 9 Feb – 7 Jun 2008 0
12 Paul Williams (2) 7 Jun – 14 Nov 2008 0
Williams vacated the title to move up in weight and fight for the vacant WBO interim junior middleweight title.[48]
13 Miguel Cotto
(def. Michael Jennings) 		21 Feb – 14 Nov 2009 1
14 Manny Pacquiao 14 Nov 2009 – 9 Jun 2012 3
15 Timothy Bradley 9 Jun 2012 – 12 Apr 2014 2
16 Manny Pacquiao (2) 12 Apr 2014 – 2 May 2015 1
17 Floyd Mayweather Jr. 2 May – 6 Jul 2015 0
Mayweather is stripped of the title for missing the deadline to pay the WBO's sanctioning fee from his 2 May bout against Manny Pacquiao and for continuing to hold world championship titles in multiple weight classes, a violation of the WBO's rules and regulations.[49]
18 Timothy Bradley (2)
(interim champion promoted) 		6 Jul 2015 – 9 Feb 2016 1
Bradley vacated the title after he chose to fight Manny Pacquiao instead of mandatory challenger Sadam Ali.[50]
19 Jessie Vargas
(def. Sadam Ali) 		5 Mar – 5 Nov 2016 0
20 Manny Pacquiao (3) 5 Nov 2016 – 2 Jul 2017 0
21 Jeff Horn 2 Jul 2017 – 9 Jun 2018 1
22 Terence Crawford 9 Jun 2018 – 12 Aug 2024 7
Crawford vacated the title to stay at junior middleweight.[51][52]
23 Brian Norman Jr.
(interim champion promoted) 		12 Aug 2024 – present 0

Junior welterweight

[edit]
No. Name Reign Defenses
1 Héctor Camacho
(def. Ray Mancini) 		6 Mar 1989 – 23 Feb 1991 2
2 Greg Haugen 23 Feb – 18 May 1991 0
3 Héctor Camacho (2) 18 May 1991 – 15 May 1992 0
Camacho vacated the title to challenge the WBC champion Julio Cesar Chavez.[53]
4 Carlos González
(def. Jimmy Paul) 		29 Jun 1992 – 7 Jun 1993 3
5 Zack Padilla 7 Jun 1993 – 1 Jan 1995 4
Padilla was experiencing continuous severe headaches and was found to have a small blood clot near his brain.[54] The title was vacated.[55]
6 Sammy Fuentes
(def. Fidel Avendano) 		20 Feb 1995 – 9 Mar 1996 1
7 Giovanni Parisi 9 Mar 1996 – 29 May 1998 5
8 Carlos González (2) 29 May 1998 – 15 May 1999 0
9 Randall Bailey 15 May 1999 – 22 Jul 2000 2
10 Ener Julio 22 Jul 2000 – 25 Jun 2001 0
Julio vacated the title when a routine eye exam reveals that he has cataracts.[56]
11 DeMarcus Corley
(def. Felix Flores) 		30 Jun 2001 – 12 Jul 2003 2
12 Zab Judah 12 Jul 2003 – 18 Jun 2004 1
Judah vacated the title to move up to the welterweight division.[57]
13 Miguel Cotto
(def. Kelson Pinto) 		11 Sep 2004 – 27 Oct 2006 6
Cotto vacated the title to move up to welterweight.[58]
14 Ricardo Torres
(def. Mike Arnaoutis) 		18 Nov 2006 – 5 Jul 2008 3
15 Kendall Holt 5 July 2008 – 4 Apr 2009 1
16 Timothy Bradley 4 Apr 2009 – 27 Jun 2012 3
Bradley vacated the title after moving up to welterweight.[59]
17 Juan Manuel Márquez
(interim champion promoted) 		27 Jun 2012 – 12 Oct 2013 0
The WBO decided that Márquez would be allowed to enter as a champion in his fight against Timothy Bradley, but the title would be immediately declared vacated following the fight.[60]
18 Mike Alvarado
(interim champion promoted) 		12 Oct – 19 Oct 2013 0
19 Ruslan Provodnikov 19 Oct 2013 – 14 Jun 2014 0
20 Chris Algieri 14 Jun – 2 Nov 2014 0
Algieri vacated the title due to moving up and challenging WBO welterweight champion Manny Pacquiao.[61]
21 Terence Crawford
(def. Thomas Dulorme) 		18 Apr 2015 – 26 Oct 2017 6
Crawford vacated the title to move up to welterweight.[62]
22 Maurice Hooker
(def. Terry Flanagan) 		9 Jun 2018 – 28 Jul 2019 2
23 José Ramírez 28 Jul 2019 – 22 May 2021 1
24 Josh Taylor 22 May 2021 – 10 Jun 2023 1
25 Teofimo Lopez 10 Jun 2023 – present 2

Lightweight

[edit]
No. Name Reign Defenses
1 Mauricio Aceves
(def. Amancio Castro) 		6 May 1989 – 22 Sep 1990 1
2 Dingaan Thobela 22 Sep 1990 – 14 Jun 1992 2
Thobela's title was vacated after failing to find an opponent by 14 June; the deadline set by the WBO.[63]
3 Giovanni Parisi
(def. Javier Altamirano) 		25 Sep 1992 – 23 Jan 1994 2
Parisi vacates the title to move up to junior welterweight.[64]
4 Oscar De La Hoya
(def. Jorge Páez) 		29 Jul 1994 – 9 Feb 1996 6
De La Hoya vacates the title to move up to junior welterweight.[65]
5 Artur Grigorian
(def. Antonio Rivera) 		13 Apr 1996 – 3 Jan 2004 17
6 Acelino Freitas 3 Jan – 7 Aug 2004 0
7 Diego Corrales 7 Aug 2004 – 14 Jan 2006 1
Corrales was stripped of the title after deciding to pursue a rematch with José Luis Castillo instead of his mandatory challenger Acelino Freitas.[66]
8 Acelino Freitas (2)
(def. Zahir Raheem) 		29 Apr 2006 – 28 Apr 2007 0
9 Juan Díaz 28 Apr 2007 – 8 Mar 2008 1
10 Nate Campbell 8 Mar 2008 – 13 Feb 2009 0
Campbell was stripped of his unified IBF/WBO world titles after failing to make weight the day before his bout against Ali Funeka.[67]
11 Juan Manuel Márquez
(def. Juan Díaz) 		28 Feb 2009 – 26 Jan 2012 2
Márquez is stripped of the title for moving up to junior welterweight.[68]
12 Ricky Burns
(interim champion promoted) 		26 Jan 2012 – 1 Mar 2014 4
13 Terence Crawford 1 Mar 2014 – 5 Mar 2015 2
Crawford vacates the title to move up to junior welterweight.[69]
14 Terry Flanagan
(def. Jose Zepeda) 		11 Jul 2015 – 26 Oct 2017 5
Flanagan vacated the title to move up to junior welterweight.[70]
15 Ray Beltrán
(def. Paulus Moses) 		16 Feb – 25 Aug 2018 0
16 José Pedraza 25 Aug – 8 Dec 2018 0
17 Vasiliy Lomachenko 8 Dec 2018 – Oct 2020 3
18 Teofimo Lopez 17 Oct 2020 – 27 Nov 2021 0
19 George Kambosos Jr. 27 Nov 2021 – 5 Jun 2022 0
20 Devin Haney 5 Jun 2022 – 29 Nov 2023 2
Haney vacated the title to move up to junior welterweight.[71]
21 Denys Berinchyk
(def. Emanuel Navarrete) 		18 May 2024 – present 0

Junior lightweight

[edit]
No. Name Reign Defenses
1 John John Molina
(def. Juan Laporte) 		29 Apr – 15 Oct 1989 0
Molina was stripped the title after fighting for the IBF title.[72]
2 Kamel Bou Ali
(def. Antonio Rivera) 		9 Dec 1989 – 21 Mar 1992 2
3 Daniel Londas 21 Mar – 4 Sep 1992 0
4 Jimmi Bredahl 4 Sep 1992 – 5 Mar 1994 1
5 Oscar De La Hoya 5 Mar – 5 Jun 1994 1
De La Hoya vacated the title to move up to lightweight.[73]
6 Regilio Tuur
(def. Eugene Speed) 		24 Sep 1994 – 17 Jan 1997 6
Tuur retired as the WBO junior lightweight world champion.[74]
7 Barry Jones
(def. Wilson Palacio) 		19 Dec 1997 – 1998 0
Jones lost his boxing license after a brain scan found an anomaly. The WBO vacated his title before Jones regained his license.
8 Anatoly Alexandrov
(def. Julien Lorcy) 		16 May 1998 – 7 Aug 1999 1
9 Acelino Freitas 7 Aug 1999 – 18 Jan 2004 10
Freitas vacated the title to stay at lightweight.[75]
10 Diego Corrales
(def. Joel Casamayor) 		6 Mar – 18 Jun 2004 0
Corrales vacated the title to move up to lightweight.[76]
11 Mike Anchondo
(def. Pablo Chacón) 		15 Jul 2004 – 8 Apr 2005 0
12 Jorge Rodrigo Barrios 8 Apr 2005 – 15 Sep 2006 2
Barrios was stripped of the title after failing to make weight the day before his scheduled bout against Joan Guzmán.[77]
13 Joan Guzmán
(def. Jorge Rodrigo Barrios) 		16 Sep 2006 – 14 May 2008 2
Guzmán vacated the title to move up to lightweight after continued difficulties negotiating a bout against mandatory challenger Alex Arthur.[78]
14 Alex Arthur
(interim champion promoted) 		14 May – 9 Sep 2008 0
15 Nicky Cook 9 Sep 2008 – 14 Mar 2009 0
16 Román Martínez 14 Mar 2009 – 4 Sep 2010 2
17 Ricky Burns 4 Sep 2010 – 13 Sep 2011 3
Burns vacated the title to move up to lightweight.[79]
18 Adrien Broner
(def. Vicente Martín Rodríguez) 		26 Nov 2011 – 20 Jul 2012 1
Broner was stripped of the title after failing to make weight the day before his scheduled bout against mandatory challenger Vicente Escobedo.[80]
19 Román Martínez (2)
(def. Miguel Beltrán Jr.) 		15 Sep 2012 – 9 Nov 2013 2
20 Mikey Garcia 9 Nov 2013 – 14 Oct 2014 1
Garcia vacates the title to move up to junior welterweight.[81]
21 Orlando Salido
(interim champion promoted) 		14 Oct 2014 – 11 Apr 2015 0
22 Román Martínez (3) 11 Apr 2015 – 11 Jun 2016 1
23 Vasiliy Lomachenko 11 Jun 2016 – 23 May 2018 4
Lomachenko vacated the title after moving up in weight and defeating Jorge Linares for the WBA lightweight world championship.[82]
24 Masayuki Ito
(def. Christopher Díaz) 		28 Jul 2018 – 25 May 2019 1
25 Jamel Herring 25 May 2019 – 23 Oct 2021 3
26 Shakur Stevenson 23 Oct 2021 – 22 Sep 2022 1
Stevenson was stripped of the title after missing weight in his fight against mandatory challenger Robson Conceição.[83]
27 Emanuel Navarrete
(def. Liam Wilson) 		3 Feb 2023 – present 2

Featherweight

[edit]
No. Name Reign Defenses
1 Maurizio Stecca
(def. Pedro Nolasco) 		28 Jan – 11 Nov 1989 1
2 Louie Espinoza 11 Nov 1989 – 7 Apr 1990 0
3 Jorge Páez 7 Apr 1990 – 16 Jan 1991 1
Paez vacates the title to move up to junior lightweight.[84]
4 Maurizio Stecca (2)
(def. Armando Juan Reyes) 		26 Jan 1991 – 16 Feb 1992 2
5 Colin McMillan 16 Feb – 26 Sep 1992 0
6 Rubén Darío Palacio 26 Sep 1992 – 16 Apr 1993 0
Palacio was stripped of the title after failing a pre-fight medical examination due to testing positive for HIV.[85]
7 Steve Robinson
(def. John Davison) 		17 Apr 1993 – 30 Sep 1995 7
8 Naseem Hamed 30 Sep 1995 – 5 Oct 2000 15
Hamed vacated the title after HBO refused to approve mandatory challenger István Kovács as his opponent.[86]
9 István Kovács
(def. Antonio Díaz) 		27 Jan – 16 Jun 2001 0
10 Pablo Chacón 16 Jun 2001 – 19 Oct 2002 2
11 Scott Harrison 19 Oct 2002 – 12 Jul 2003 2
12 Manuel Medina 12 Jul – 29 Nov 2003 0
13 Scott Harrison (2) 29 Nov 2003 – 6 Dec 2006 6
Harrison vacated the title after withdrawing from a bout against Nicky Cook because he could no longer make the featherweight limit.[87]
14 Juan Manuel Márquez
(interim champion promoted) 		6 Dec 2006 – 3 Apr 2007 0
Márquez vacated the title to stay at junior lightweight.[88]
15 Steven Luevano
(def. Nicky Cook) 		14 Jul 2007 – 23 Jan 2010 5
16 Juan Manuel López 23 Jan 2010 – 16 Apr 2011 1
17 Orlando Salido 16 Apr 2011 – 19 Jan 2013 2
18 Mikey Garcia 19 Jan – 14 Jun 2013 0
Garcia was stripped of the title after failing to make weight the day before his scheduled bout against Juan Manuel López.[89]
19 Orlando Salido (2)
(def. Orlando Cruz) 		12 Oct 2013 – 28 Feb 2014 0
Salido was stripped of the title after failing to make weight the day before his scheduled bout against Vasiliy Lomachenko.[90]
20 Vasiliy Lomachenko
(def. Gary Russell Jr.) 		21 Jun 2014 – 21 Jul 2016 3
Lomachenko vacated the title to stay at junior lightweight.[91]
21 Óscar Valdez
(def. Matías Rueda) 		23 Jul 2016 – 2 Aug 2019 6
Valdez vacates the title to move up to junior lightweight.[92]
22 Shakur Stevenson
(def. Joet Gonzalez) 		26 Oct 2019 – 7 Jul 2020 0
Stevenson vacated the title to move up to junior lightweight.[93]
23 Emanuel Navarrete
(def. Ruben Villa) 		9 Oct 2020 – 9 Feb 2023 3
Navarrete vacated the title to stay at junior lightweight.[94]
24 Robeisy Ramírez
(def. Isaac Dogboe) 		1 Apr – 9 Dec 2023 1
25 Rafael Espinoza 9 Dec 2023 – present 1

Junior featherweight

[edit]
No. Name Reign Defenses
1 Kenny Mitchell
(def. Julio Gervacio) 		29 Apr – 9 Dec 1989 1
2 Valerio Nati 9 Dec 1989 – 12 May 1990 0
3 Orlando Fernandez 12 May 1990 – 24 May 1991 0
4 Jesse Benavides 24 May 1991 – 15 Oct 1992 1
5 Duke McKenzie 15 Oct 1992 – 9 Jun 1993 0
6 Daniel Jiménez 9 Jun 1993 – 31 Mar 1995 4
7 Marco Antonio Barrera 31 Mar 1995 – 22 Nov 1996 8
8 Junior Jones 22 Nov 1996 – 18 Apr 1997 1
9 Kennedy McKinney 18 April 1997 – 30 May 1998 0
McKinney vacated the title to challenge WBO featherweight champion Naseem Hamed however, the fight was cancelled after Hamed suffered an injury to his right hand during training.[95]
10 Marco Antonio Barrera (2)
(def. Richie Wenton) 		31 Oct 1998 – 19 Feb 2000 2
11 Erik Morales 19 Feb – 24 Feb 2000 0
Morales was stripped of the title after the WBO committee disagreed with the scorecards in his bout against Barrera. Barrera was also reinstated as the champion.[96]
12 Marco Antonio Barrera (3)
(reinstated) 		24 Feb 2000 – 1 Jun 2001 2
Barrera vacated the title to stay at featherweight.[97]
13 Agapito Sánchez
(def. Jorge Monsalvo) 		23 Jun 2001 – 13 Aug 2002 1
Sánchez is stripped of the title for failing a pre-fight eye test.[98]
14 Joan Guzmán
(def. Fabio Daniel Oliva) 		17 Aug 2002 – 4 Jul 2005 2
Guzmán vacated the title to move up to featherweight.[99]
15 Daniel Ponce de León
(def. Sod Looknongyangtoy) 		29 Oct 2005 – 7 Jun 2008 6
16 Juan Manuel López 7 Jun 2008 – Jan 2010 5
López vacated the title to move up to featherweight.
17 Wilfredo Vázquez Jr.
(def. Marvin Sonsona) 		27 Feb 2010 –7 May 2011 2
18 Jorge Arce 7 May – 18 Nov 2011 1
Arce vacated the title to move down to bantamweight.[100]
19 Nonito Donaire
(def. Wilfredo Vázquez Jr.) 		4 Feb 2012 – 13 Apr 2013 3
20 Guillermo Rigondeaux 13 Apr 2013 – 28 Oct 2015 3
Rigondeaux was stripped of the title due to inactivity.[101]
21 Nonito Donaire (2)
(def. César Juárez) 		11 Dec 2015 – 5 Nov 2016 1
22 Jessie Magdaleno 5 Nov 2016 – 28 Apr 2018 1
23 Isaac Dogboe 28 Apr – 8 Dec 2018 1
24 Emanuel Navarrete 8 Dec 2018 – 11 Jul 2020 5
Navarrete vacated the title to move up to featherweight.[102]
25 Angelo Leo
(def. Tramaine Williams) 		1 Aug 2020 – 23 Jan 2021 0
26 Stephen Fulton 23 Jan 2021 – 25 Jul 2023 2
27 Naoya Inoue 25 Jul 2023 – present 3

Bantamweight

[edit]
No. Name Reign Defenses
1 Israel Contreras
(def. Maurizio Lupino) 		3 Feb 1989 – 20 Feb 1991 1
Contreras vacated the title in order to challenge Luisito Espinosa for the WBA title.[103]
2 Gaby Canizales
(def. Miguel Lora) 		12 Mar – 30 Jun 1991 0
3 Duke McKenzie 30 Jun 1991 – 13 May 1992 2
4 Rafael del Valle 13 May 1992 – 30 Jul 1994 2
5 Alfred Kotey 30 Jul 1994 – 21 Oct 1995 2
6 Daniel Jiménez 21 Oct 1995 – 26 Apr 1996 1
7 Robbie Regan 26 Apr 1996 – 18 Jul 1997 0
Regan vacated the title due to health problems.[104]
8 Jorge Eliécer Julio
(def. Oscar Maldonado) 		28 Jul 1997 – 8 Jan 2000 3
9 Johnny Tapia 8 Jan – 16 Aug 2000 1
Tapia vacated the title to fight Paulie Ayala at junior featherweight.[105]
10 Mauricio Martínez
(def. Lester Fuentes) 		4 Sep 2000 – 15 Mar 2002 1
11 Cruz Carbajal 15 Mar 2002 – 7 May 2004 2
12 Ratanachai Sor Vorapin 7 May 2004 – 29 Oct 2005 1
13 Jhonny González 29 Oct 2005 – 11 Aug 2007 1
14 Gerry Peñalosa 11 Aug 2007 – 25 Apr 2009 1
Peñalosa was stripped of the title after moving up and challenging WBO junior featherweight champion Juan Manuel López.[106]
15 Fernando Montiel
(interim champion promoted) 		25 Apr 2009 – 19 Feb 2011 2
16 Nonito Donaire 19 Feb – 22 Oct 2011 1
Donaire vacates the title to move up to junior featherweight.[107]
17 Jorge Arce
(def. Angky Angkotta) 		26 Nov 2011 – 15 Aug 2012 0
Arce intends to stay at junior featherweight. The title is vacated on WBO's August 2012 rankings.[108]
18 Pungluang Sor Singyu
(def. A. J. Banal) 		20 Oct 2012 – 2 Mar 2013 0
19 Paulus Ambunda 2 Mar – 1 Aug 2013 0
20 Tomoki Kameda 1 Aug 2013 – 23 Apr 2015 3
Kameda's request to make his fight with Jamie McDonnell a unification bout was rejected by the WBO as McDonnell was only the "regular" champion which is considered a secondary title by the WBO.[109] As a result, Kameda relinquished his title.[110]
21 Pungluang Sor Singyu (2)
(def. Ryo Akaho) 		8 Aug 2015 – 27 Jul 2016 1
22 Marlon Tapales 27 Jul 2016 – 22 Apr 2017 0
Tapales was stripped of the title after failing to make weight the day before his bout against Shohei Omori.[111]
23 Zolani Tete
(interim champion promoted) 		23 Apr 2017 – 30 Nov 2019 3
24 John Riel Casimero 30 Nov 2019 – 3 May 2022 2
Casimero was stripped of the title after the fight with his mandatory challenger, Paul Butler got cancelled for the second time. According to the British Boxing Board of Control, the fight was called off due to Casimero cutting too much weight and using a sauna prior to the weigh-ins.[112]
25 Paul Butler
(interim champion promoted) 		3 May – 13 Dec 2022 0
26 Naoya Inoue 13 Dec 2022 – 13 Jan 2023 0
Inoue vacated the title in order to move up to junior featherweight.[113]
27 Jason Moloney
(def. Vincent Astrolabio) 		13 May 2023 – 6 May 2024 1
28 Yoshiki Takei 6 May 2024 – present 1

Junior bantamweight

[edit]
No. Name Reign Defenses
1 José Ruíz Matos
(def. Bebis Rojas) 		29 Apr 1989 – 22 Feb 1992 4
2 José Quirino 22 Feb – 4 Sep 1992 0
3 Johnny Bredahl 4 Sep 1992 – 16 Jul 1994 3
Bredahl was stripped of the title.[114]
4 Johnny Tapia
(def. Henry Martínez) 		14 Oct 1994 – Dec 1998 13
Tapia vacates the title to move up to bantamweight.
5 Victor Godoi
(interim champion promoted) 		Dec 1998 – 7 Jun 1999 0
6 Diego Morales 7 Jun – 20 Nov 1999 1
7 Adonis Rivas 20 Nov 1999 – 16 Jun 2001 2
8 Pedro Alcázar 16 Jun 2001 – 22 Jun 2002 1
9 Fernando Montiel 22 Jun 2002 – 16 Aug 2003 1
10 Mark Johnson 16 Aug 2003 – 25 Sep 2004 1
11 Iván Hernández 25 Sep 2004 – 9 Apr 2005 0
12 Fernando Montiel (2) 9 Apr 2005 – 10 Feb 2009 6
Montiel reportedly was open in fighting Vic Darchinyan for the undisputed championship however,[115] on the following day, Montiel's title was reportedly vacated.[116]
13 José López
(def. Pramuansak Posuwan) 		28 Mar – 4 Sep 2009 0
14 Marvin Sonsona 4 Sep – 20 Nov 2009 0
Sonsona was stripped of the title after failing to make weight on the day of his bout against Alejandro Hernández.[117]
15 Jorge Arce
(def. Angky Angkotta) 		30 Jan – Apr 2010 0
Arce vacates his title to move up to bantamweight.
16 Omar Narváez
(def. Everth Briceño) 		15 May 2010 – 30 Dec 2014 11
17 Naoya Inoue 30 Dec 2014 – 6 Mar 2018 7
Inoue vacates the title to move up to bantamweight.[118]
18 Donnie Nietes
(def. Kazuto Ioka) 		31 Dec 2018 – 28 Feb 2019 0
Nietes vacates the title to pursue a career-defining fight.[119]
19 Kazuto Ioka
(def. Aston Palicte) 		19 Jun 2019 – 15 Feb 2023 6
Ioka vacates the title to pursue a rematch with Joshua Franco.[120]
20 Junto Nakatani
(def. Andrew Moloney) 		20 May – 13 Dec 2023 1
Nakatani vacates the title to move up to bantamweight.[121]
21 Kosei Tanaka
(def. Christian Bacasegua) 		24 Feb – 14 Oct 2024 0
22 Phumelele Cafu 14 Oct 2024 – present 0

Flyweight

[edit]
No. Name Reign Defenses
1 Elvis Álvarez
(def. Miguel Mercedes) 		3 Mar 1989 – 1990 0
Álvarez vacates the title due to lack of interest in it.
2 Isidro Pérez
(def. Angel Rosario) 		18 Aug 1990 – 18 Mar 1992 2
3 Pat Clinton 18 Mar 1992 – 15 May 1993 1
4 Jacob Matlala 15 May 1993 – 11 Feb 1995 3
5 Alberto Jiménez 11 Feb 1995 – 13 Dec 1996 5
6 Carlos Gabriel Salazar 13 Dec 1996 – 14 Aug 1998 5
7 Rubén Sánchez León 14 Aug 1998 – 23 Apr 1999 1
8 José Antonio López Bueno 23 Apr 1999 – 1999 1
Bueno vacates the title due to an ankle injury thus preventing him from defending the title.
9 Isidro García
(def. José López) 		18 Dec 1999 – 15 Dec 2000 1
10 Fernando Montiel 15 Dec 2000 – 22 Jun 2002 3
Montiel's title was vacated when he stepped on the ring against Pedro Alcázar for his WBO junior bantamweight title.[122]
11 Adonis Rivas
(interim champion promoted) 		22 Jun – 13 Jul 2002 0
12 Omar Narváez 13 Jul 2002 – 14 May 2010 16
Narváez vacates the title to move up to junior bantamweight.[123]
13 Julio César Miranda
(def. Richie Mepranum) 		12 Jun 2010 – 16 Jul 2011 3
14 Brian Viloria 16 Jul 2011 – 6 Apr 2013 3
15 Juan Francisco Estrada 6 Apr 2013 – 14 Sep 2016 5
Estrada vacates the title to move up to junior bantamweight.[124]
16 Zou Shiming
(def. Prasitsak Phaprom) 		5 Nov 2016 – 28 Jul 2017 0
17 Sho Kimura 28 Jul 2017 – 24 Sep 2018 2
18 Kosei Tanaka 24 Sep 2018 – 31 Jan 2020 3
Tanaka vacates the title to move up to junior bantamweight.[125]
19 Junto Nakatani
(def. Giemel Magramo) 		6 Nov 2020 – 27 Oct 2022 2
Nakatani vacates the title to move up to junior bantamweight.[126]
20 Jesse Rodriguez
(def. Christian Gonzalez) 		8 Apr 2023 – 29 Mar 2024 1
Rodriguez vacates the title to move up to junior bantamweight.[127]
21 Anthony Olascuaga
(def. Riku Kano) 		20 Jul 2024 – present 1

Junior flyweight

[edit]
No. Name Reign Defenses
1 José de Jesús
(def. Fernando Martínez) 		19 May 1989 – Mar 1992 3
de Jesús was stripped of the title after failing to defend it in a specific time period.
2 Josué Camacho
(def. Eddie Vallejo) 		31 Jul 1992 – 15 Jul 1994 1
3 Michael Carbajal 15 Jul – 12 Nov 1994 0
Carbajal is stripped of the title for failing to defend the title.
4 Paul Weir
(def. Paul Oulden) 		23 Nov 1994 – 18 Nov 1995 1
5 Jacob Matlala 18 Nov 1995 – 1997 2
Matlala vacates the title to fight Michael Carbajal rather than defend his title.
6 Jesús Chong
(def. Eric Griffin) 		31 May – 25 Aug 1997 0
7 Melchor Cob Castro 25 Aug 1997 – 17 Jan 1998 0
8 Juan Domingo Córdoba 17 Jan – 5 Dec 1998 1
9 Jorge Arce 5 Dec 1998 – 31 Jul 1999 1
10 Michael Carbajal (2) 31 Jul – Aug 1999 0
Carbajal retires.
11 Masibulele Makepula
(def. Jacob Matlala) 		19 Feb 2000 – 2000 0
Makepula vacates the title to move up to flyweight.
12 Nelson Dieppa
(def. Andy Tabanas) 		14 Apr 2001 – 30 Apr 2005 5
13 Hugo Cázares 30 Apr 2005 – 25 Aug 2007 4
14 Iván Calderón 25 Aug 2007 – 28 Aug 2010 6
15 Giovani Segura 28 Aug 2010 – 22 Apr 2011 1
Segura vacates the title to move up to flyweight.[128]
16 Jesús Géles
(interim champion promoted) 		22 Apr – 30 Apr 2011 0
17 Ramón García Hirales 30 Apr – 8 Oct 2011 0
18 Donnie Nietes 8 Oct 2011 – 3 Aug 2016 9
Nietes vacates the title to move up to flyweight.[129]
19 Kosei Tanaka
(def. Moisés Fuentes) 		31 Dec 2016 – 30 Nov 2017 2
Tanaka vacates the title to move up to flyweight.[130]
20 Ángel Acosta
(def. Juan Alejo) 		2 Dec 2017 – 21 Jun 2019 3
21 Elwin Soto 21 Jun 2019 – 16 Oct 2021 3
22 Jonathan González 16 Oct 2021 – 19 Jun 2024 2
González vacates the title to move up to flyweight.[131]
23 Shokichi Iwata
(def. Jairo Noriega) 		13 Oct 2024 – present 0

Mini flyweight

[edit]
No. Name Reign Defenses
1 Rafael Torres
(def. Yamil Caraballo) 		30 Aug 1989 – 1993 1
Torres vacates the title.
2 Paul Weir
(def. Fernando Martínez) 		15 May – 16 Dec 1993 1
Weir vacates the title to move up in weight and challenge Josué Camacho for a junior flyweight world title.[132]
3 Alex Sánchez
(def. Orlando Malone) 		22 Dec 1993 – 23 Aug 1997 6
4 Ricardo López 23 Aug – Aug 1997 0
After winning the title, López was stripped of the title after he stated that he would give the championship belt to his father. The WBO president at that time deemed it as a "public resignation".[133]
5 Eric Jamili
(def. Mickey Cantwell) 		19 Dec 1997 – 30 May 1998 0
6 Kermin Guardia 30 May 1998 – 2001 3
Guardia vacates the title to move up to junior flyweight.
7 Jorge Mata
(def. Reynaldo Frutos) 		29 Jun 2002 – 28 Mar 2003 1
8 Eduardo Ray Márquez 28 Mar – 3 May 2003 0
9 Iván Calderón 3 May 2003 – 25 Aug 2007 11
Calderón's title is vacated when he won the WBO junior flyweight title.
10 Donnie Nietes
(def. Pornsawan Porpramook) 		30 Sep 2007 – 28 Feb 2011 4
Nietes vacates the title to move up in weight and challenge Ramón García Hirales for the WBO junior flyweight title.[134]
11 Raúl García
(interim champion promoted) 		28 Feb – 27 Aug 2011 1
12 Moisés Fuentes 27 Aug 2011 – 19 Apr 2013 2
Fuentes vacates the title to move up to junior flyweight.[135]
13 Merlito Sabillo
(interim champion promoted) 		19 Apr 2013 – 22 Mar 2014 2
14 Francisco Rodríguez Jr. 22 Mar – 15 Dec 2014 1
Rodríguez intends to move in weight class. The title is vacated on WBO's December 2014 rankings.[136]
15 Katsunari Takayama
(def. Go Odaira) 		31 Dec 2014 – 3 Mar 2015 0
Takayama vacates his WBO title to skip his mandatory challenger in favor of a fight with former champion Fahlan Sakkreerin.[137]
16 Kosei Tanaka
(def. Julián Yedras) 		30 May 2015 – 7 Apr 2016 1
Tanaka vacates the title to move up to junior flyweight.[138]
17 Katsunari Takayama (2)
(def. Riku Kano) 		20 Aug 2016 – 3 Apr 2017 0
Takayama retired from professional boxing in order to concentrate on training for the 2020 Summer Olympics.[139] Interim champion Fukura is later promoted to full champion.[140]
18 Tatsuya Fukuhara
(interim champion promoted) 		14 Apr – 27 Aug 2017 0
19 Ryuya Yamanaka 27 Aug 2017 – 13 Jul 2018 1
20 Vic Saludar 13 Jul 2018 – 24 Aug 2019 1
21 Wilfredo Méndez 24 Aug 2019 – 14 Dec 2021 2
22 Masataka Taniguchi 14 Dec 2021 – 6 Jan 2023 1
23 Melvin Jerusalem 6 Jan – 27 May 2023 0
24 Oscar Collazo 27 May 2023 – present 3

See also

[edit]

References

[edit]
  1. ^ "Mercer stripped of title". The Gazette. Montréal, Québec, Canada. 28 December 1991. Retrieved 5 July 2019 – via Newspapers.com.
  2. ^ "Bowe must face legitimate challengers now". The News Journal. Wilmington, Delaware. 9 February 1993. Retrieved 9 November 2021 – via Newspapers.com.
  3. ^ "Incentive may solve bulk of the problem". The Boston Globe. Boston, Massachusetts. 5 May 1996. Retrieved 9 November 2021 – via Newspapers.com.
  4. ^ Murraine, St. Clair (30 January 1997). "Akinwande tosses belt to pursue bigger title". Tallahassee Democrat. Tallahassee, Florida. Retrieved 9 July 2019 – via Newspapers.com.
  5. ^ "Sanders relinquishes WBO title!". Eastside Boxing. 7 October 2003. Archived from the original on 9 October 2003. Retrieved 3 September 2022.
  6. ^ Rafael, Dan (13 October 2016). "Tyson Fury vacates heavyweight belts amid treatment for depression". ESPN. Archived from the original on 16 February 2019. Retrieved 5 July 2019.
  7. ^ "Injury forces Nelson retirement". BBC Sport. 22 September 2006. Archived from the original on 3 July 2016. Retrieved 3 July 2019.
  8. ^ "Maccarinelli set for title tilt". BBC. 14 July 2008. Archived from the original on 28 April 2021. Retrieved 26 September 2021.
  9. ^ "Usyk Relinquishes WBO Title; Glowacki Upgraded To Full Titlist". WBO. 5 June 2019. Archived from the original on 4 July 2019. Retrieved 4 July 2019.
  10. ^ "Delayed World Boxing Super Series Final loses ANOTHER world title belt". World Boxing News. 27 November 2019. Archived from the original on 10 April 2021. Retrieved 3 February 2020.
  11. ^ "Jürgen Brähmer is now the full WBO light heavyweight world champion". Fightnews. 13 November 2009. Archived from the original on 15 November 2009. Retrieved 5 August 2021.
  12. ^ Herman, Martyn (18 May 2011). "Braehmer stripped of his title, goes to Cleverly". Reuters. Archived from the original on 4 July 2019. Retrieved 3 July 2019.
  13. ^ Velin, Bob (21 September 2017). "Unbeaten light heavyweight champ Andre Ward retires from boxing at peak of his career". USA Today. Archived from the original on 8 February 2018. Retrieved 3 July 2019.
  14. ^ Ring TV (17 December 2019). "Canelo Alvarez vacates WBO Light heavyweight title". The Ring. Archived from the original on 30 April 2021. Retrieved 5 August 2021.
  15. ^ "The World Boxing Organization ratings as of April 15, 1991". Quad City Times. Davenport, Iowa. 8 May 1991. Retrieved 9 November 2021 – via Newspapers.com.
  16. ^ "Collins stripped of WBO title". The Dispatch. Moline, Illinois. 2 October 1997. Retrieved 4 July 2019 – via Newspapers.com.
  17. ^ "Calzaghe ends division domination". BBC. 26 September 2008. Archived from the original on 27 September 2008. Retrieved 26 September 2021.
  18. ^ Rafael, Dan (13 May 2019). "Zurdo Ramirez vacates super middleweight title". ESPN. Archived from the original on 2 June 2019. Retrieved 3 July 2019.
  19. ^ "Eubank fight put back". Evening Standard. London, Greater London. 16 July 1991. Retrieved 9 November 2021 – via Newspapers.com.
  20. ^ "Hearn is making plans for Nigel". Evening Standard. London, Greater London. 17 July 1991. Retrieved 9 November 2021 – via Newspapers.com.
  21. ^ "Kalambay to fight Pyatt for the vacant WBO title". The Philadelphia Inquirer. Philadelphia, Pennsylvania. 2 April 1993. Retrieved 9 November 2021 – via Newspapers.com.
  22. ^ "George eyes next cupcake". Daily News. New York, New York. 22 April 1995. Retrieved 9 November 2021 – via Newspapers.com.
  23. ^ "Boxer Grant gets shot at world title". The Gazette. Montreal, Quebec. 30 October 1997. Retrieved 11 November 2021 – via Newspapers.com.
  24. ^ "Ryan Rhodes will meet Canada's Otis Grant for the vacant WBO middleweight title at the Ponds Forge Leisure Centre in Rhodes's home town of Sheffield on December 1". The Guardian. London, Greater London. 7 November 1997. Retrieved 11 November 2021 – via Newspapers.com.
  25. ^ Katz, Michael (16 November 1998). "As Jones fizzles, Mosley sizzles". Daily News. New York, New York. Retrieved 6 July 2019 – via Newspapers.com.
  26. ^ "Schenk deja vacante el titulo mediano OMB". El Nuevo Herald (in Spanish). Miami, Florida. 14 July 1999. Retrieved 11 November 2021 – via Newspapers.com.
  27. ^ "Boxing champ Harry Simon charged with culpable homicide after car accident". Tallahassee Democrat. Tallahassee, Florida. 26 December 2002. Retrieved 11 November 2021 – via Newspapers.com.
  28. ^ Ihuhua, Corry (8 July 2003). "Velasco takes Harry's title". The Namibian. Archived from the original on 11 November 2021. Retrieved 11 November 2021.
  29. ^ Rafael, Dan (1 June 2010). "WBO strips Martinez of title". ESPN. Archived from the original on 29 September 2018. Retrieved 4 July 2019.
  30. ^ Stangrit, Gregory (3 September 2012). "Dmitry Pirog Not Surprised WBO Took Away His Title". Boxingscene. Archived from the original on 7 August 2021. Retrieved 7 August 2021.
  31. ^ Fischer, Doug (4 September 2014). "Peter Quillin vacates WBO title, pulls out of Matt Korobov fight". The Ring. Archived from the original on 4 July 2019. Retrieved 4 July 2019.
  32. ^ Rafael, Dan (11 October 2018). "Billy Joe Saunders vacates 160-pound title after positive doping test". ESPN. Archived from the original on 9 April 2019. Retrieved 4 July 2019.
  33. ^ WBO (26 August 2022). "WBO CHAMPIONSHIP COMMITTEE RESOLUTION: In the Matter of the WBO Middleweight Division" (PDF). WBO. Archived (PDF) from the original on 4 September 2022. Retrieved 29 August 2022.
  34. ^ "Title's vacant following draw". The Montana Standard. Butte, Montana. 18 February 1990. Retrieved 11 November 2021 – via Newspapers.com.
  35. ^ "Bowe-Holyfield II on the way". Daily News. New York, New York. 5 August 1993. Retrieved 11 November 2021 – via Newspapers.com.
  36. ^ Plunkett, Bill (27 February 1996). "British boxer backs out, WBO strips belt". The Desert Sun. Palm Springs, California. Retrieved 4 July 2019 – via Newspapers.com.
  37. ^ "WBO title vacant or not?". Fightnews. 27 November 2001. Archived from the original on 12 December 2001. Retrieved 11 November 2021.
  38. ^ Rosenburg, David (7 October 2011). "Dzinziruk Gets Stripped, Baysangurov The New Champ". Boxingscene. Archived from the original on 5 September 2021. Retrieved 5 September 2021.
  39. ^ Jay, Phil (22 July 2013). "Baysangurov stripped of WBO belt, Andrade in line for vacant title". World Boxing News. Archived from the original on 4 July 2019. Retrieved 4 July 2019.
  40. ^ Rafael, Dan (11 October 2018). "WBO strips Demetrius Andrade of junior middleweight title due to inactivity". ESPN. Archived from the original on 27 June 2017. Retrieved 4 July 2019.
  41. ^ "Ranking as of May 21 2017" (PDF). WBA. Retrieved 4 October 2021.
  42. ^ Themistode, Hans (23 November 2019). "Jamie Munguia Vacates Title To Face Gary O'Sullivan in Middleweight Debut". Boxing Insider. Archived from the original on 3 August 2021. Retrieved 3 August 2021.
  43. ^ Naghten, Tom (3 August 2023). "Jermell Charlo to be stripped of WBO super-welterweight title, Tim Tszyu to be elevated to champion". The Sporting News. Archived from the original on 16 August 2023. Retrieved 29 September 2023.
  44. ^ "The World Boxing Organization ratings as of November 1989". Pottsville Republican. Pottsville, Pennsylvania. 28 November 1989. Retrieved 9 November 2021 – via Newspapers.com.
  45. ^ "WBO title stripped from flu-stricken boxer". Calgary Herald. Calgary, Alberta, Canada. 14 October 1993. Retrieved 4 July 2019 – via Newspapers.com.
  46. ^ Katz, Michael (21 November 1996). "Make room for Oscar". Daily News. New York, New York. Retrieved 4 July 2019 – via Newspapers.com.
  47. ^ "Definenal fin la fecha". La Voz Espana. Allentown, Pennsylvania. 5 December 2001. Retrieved 9 November 2021 – via Newspapers.com.
  48. ^ Rafael, Dan (14 November 2008). "Ambitious Williams vacates welterweight belt". ESPN. Archived from the original on 4 July 2019. Retrieved 4 July 2019.
  49. ^ Rafael, Dan (6 July 2015). "Floyd Mayweather Jr. stripped of WBO welterweight title". ESPN. Archived from the original on 31 January 2018. Retrieved 4 July 2019.
  50. ^ Rafael, Dan (9 February 2016). "Unable to fulfill mandatory defense, Timothy Bradley Jr. vacates title". ESPN. Archived from the original on 25 February 2019. Retrieved 4 July 2019.
  51. ^ "Resolution: In the Matter of the WBO Welterweight Division". WBO. 12 August 2024. Archived from the original on 12 August 2024. Retrieved 12 August 2024.
  52. ^ Donovan, Jake (12 August 2024). "Terence Crawford vacates WBO welterweight title; Brian Norman Jr. elevated to full titlist". The Ring. Archived from the original on 12 August 2024. Retrieved 12 August 2024.
  53. ^ "San Juan". El Nuevo Herald. Miami, Florida. 15 May 1992. Retrieved 9 November 2021 – via Newspapers.com.
  54. ^ Kawakami, Tim (2 September 1994). "Padilla's Retirement Expected Over Clot". Los Angeles Times. Archived from the original on 13 November 2021. Retrieved 13 November 2021.{{cite news}}: CS1 maint: bot: original URL status unknown (link)
  55. ^ "At Inglewood, Calif". Tampa Bay Times. St. Petersburg, Florida. 1 January 1995. Retrieved 9 November 2021 – via Newspapers.com.
  56. ^ Iole, Kevin (1 July 2001). "Corley Knocks Out Flores In 1st Round to Win Title". The Washington Post. Archived from the original on 12 November 2021. Retrieved 12 November 2021.
  57. ^ "Jones Jr. eyes return!". Fightnews. 18 June 2004. Archived from the original on 18 June 2004. Retrieved 13 November 2021.
  58. ^ "Cotto gives up WBO 140lb title!". Fightnews. 27 October 2006. Archived from the original on 17 November 2006. Retrieved 13 November 2021.
  59. ^ Rafael, Dan (27 June 2012). "Timothy Bradley Jr. stays at 147". ESPN. Archived from the original on 4 July 2019. Retrieved 4 July 2019.
  60. ^ Rafael, Dan (3 September 2013). "Alvarado to be elevated to full titlist". ESPN. Archived from the original on 11 September 2018. Retrieved 24 August 2021.
  61. ^ Christ, Scott (2 November 2014). "Chris Algieri forced to vacate 140-pound belt for Pacquiao fight". Bad Left Hook. Archived from the original on 25 March 2015. Retrieved 4 July 2019.
  62. ^ Rafael, Dan (30 October 2017). "Terence Crawford moving up to fight in 147-pound welterweight division". ESPN. Archived from the original on 31 March 2019. Retrieved 4 July 2019.
  63. ^ "Lopez is wooed by Stockton promoter". Sacramento Bee. Sacramento, California. 12 May 1992. Retrieved 14 November 2021 – via Newspapers.com.
  64. ^ "CMB anuncia pelea Parisi vs JC Chavez". El Nuevo Herald (in Spanish). Miami, Florida. 23 January 1994. Retrieved 9 November 2021 – via Newspapers.com.
  65. ^ "Just tuning up for showdown". The Record. Hackensack, New Jersey. 9 February 1996. Retrieved 14 November 2021 – via Newspapers.com.
  66. ^ Idec, Keith (14 January 2006). "Corrales-Castillo fight postponed". The Herald-News. Passaic, New Jersey. Retrieved 4 July 2019 – via Newspapers.com.
  67. ^ Rafael, Dan (13 February 2009). "Campbell can't make weight for Funeka". ESPN. Archived from the original on 21 May 2018. Retrieved 4 July 2019.
  68. ^ Gilfoid, Scott (26 January 2012). "Ricky Burns handed WBO lightweight title after Juan Manuel Marquez stripped of title". Boxingnews24. Archived from the original on 30 January 2012. Retrieved 20 August 2021.
  69. ^ "Undefeated Terence Crawford moves up for junior welterweight title shot". Fox Sports. 5 March 2015. Archived from the original on 24 August 2021. Retrieved 24 August 2021.
  70. ^ "Terry Flanagan vacates WBO title, heads to 140 as #1 contender / Terence Crawford mandatory at 147". World Boxing News. 27 October 2017. Archived from the original on 4 July 2019. Retrieved 4 July 2019.
  71. ^ Coppinger, Mike (29 November 2023). "Undisputed lightweight champion Devin Haney to vacate titles". ESPN. Archived from the original on 30 November 2023. Retrieved 30 November 2023.
  72. ^ "OMB desconoce a Juan Molina". El Nuevo Herald (in Spanish). Miami, Florida. 15 October 1989. Retrieved 4 July 2018 – via Newspapers.com.
  73. ^ "Something's fishy with the rating system". The Boston Globe. Boston, Massachusetts. 5 June 1994. Retrieved 4 July 2018 – via Newspapers.com.
  74. ^ "Douglas schedules 3rd bout in comeback". The Orlando Sentinel. Orlando, Florida. 17 January 1997. Retrieved 4 July 2018 – via Newspapers.com.
  75. ^ Robb, Sharon (18 January 2004). "Warriors Growing". Sun-Sentinel. Archived from the original on 1 July 2021. Retrieved 28 September 2021.
  76. ^ Hughes, Robert (18 June 2004). "Anchondo vs Rees official!". Fightnews. Archived from the original on 18 June 2004. Retrieved 28 September 2021.
  77. ^ Rafael, Dan (14 September 2006). "Barrios can't make weight, loses junior lightweight belt". ESPN. Archived from the original on 4 July 2019. Retrieved 4 July 2019.
  78. ^ Rafael, Dan (14 May 2008). "Guzman gives up junior lightweight belt". ESPN. Archived from the original on 4 July 2019. Retrieved 4 July 2019.
  79. ^ Gilfoid, Scort (13 September 2011). "Burns Vacates WBO Title, Will Fight Katsidis For Vacant Lightweight Belt On November 12th". Boxingnews24. Archived from the original on 3 August 2021. Retrieved 3 August 2021.
  80. ^ Rafael, Dan (20 July 2012). "Adrien Broner stripped of title". ESPN. Archived from the original on 6 February 2019. Retrieved 4 July 2019.
  81. ^ Rafael, Dan (14 October 2014). "Mikey Garcia targets 140 pounds". ESPN. Archived from the original on 11 December 2017. Retrieved 4 July 2019.
  82. ^ Rafael, Dan (25 May 2018). "Vasiliy Lomachenko vacates jr. lightweight title; Aug. 25 return off". ESPN. Archived from the original on 5 October 2018. Retrieved 4 July 2019.
  83. ^ Coppinger, Mike (22 September 2022). "Shakur Stevenson misses weight, stripped of 130-pound titles ahead of Friday's fight vs. Robson Conceicao". ESPN. Archived from the original on 22 September 2022. Retrieved 22 September 2022.
  84. ^ "Stecca-Reyes fight scheduled for Jan. 26". Hartford Courant. Hartford, Connecticut. 17 January 1991. Retrieved 14 November 2021 – via Newspapers.com.
  85. ^ "WBO champ stripped of crown after testing positive for AIDS virus". Elko Daily Free Press. Elko, Nevada. Associated Press. 16 April 1993. Retrieved 4 July 2019 – via Newspapers.com.
  86. ^ "Hamed resigns WBO title". BBC Sport. 9 October 2000. Archived from the original on 16 October 2010. Retrieved 4 July 2019.
  87. ^ "Harrison pulls out of featherweight fight vs. Cook". ESPN. Associated Press. 6 December 2006. Archived from the original on 4 July 2019. Retrieved 4 July 2019.
  88. ^ "Luevano-Cook clash planned". Fightnews. 3 April 2007. Archived from the original on 7 April 2007. Retrieved 14 November 2021.
  89. ^ "Garcia stripped of title for failing to make weight". USA Today. Associated Press. 15 June 2013. Archived from the original on 25 July 2013. Retrieved 4 July 2019.
  90. ^ Rafael, Dan (28 February 2014). "Orlando Salido stripped of world title". ESPN. Archived from the original on 4 July 2019. Retrieved 4 July 2019.
  91. ^ Coppinger, Mike (21 July 2016). "Vasyl Lomachenko will stay at 130 pounds, vacates featherweight title". USA Today. Archived from the original on 4 July 2019. Retrieved 4 July 2019.
  92. ^ Flessel, Dean (2 August 2019). "Oscar Valdez Vacates WBO Title, Shakur Stevenson Will Fight For Belt". Boxingnews24. Archived from the original on 3 August 2021. Retrieved 3 August 2021.
  93. ^ Donovan, Jake (12 July 2020). "Stevenson Officially Vacates WBO 126 Title, Installed As Number One Contender At 130". Boxingscene. Archived from the original on 5 August 2021. Retrieved 5 August 2021.
  94. ^ Mike Coppinger [@MikeCoppinger] (10 February 2023). "Emanuel Navarrete has formally vacated his WBO featherweight title, the organization announced on Thursday. This means Robeisy Ramirez and Isaac Dogboe will meet for the vacant title on April 1" (Tweet). Archived from the original on 10 February 2023. Retrieved 10 February 2023 – via Twitter.
  95. ^ "Hamed's bout knocked out". The Guardian. London, Greater London. 30 May 1998. Retrieved 15 November 2021 – via Newspapers.com.
  96. ^ "Barrera restituido". El Nuevo Herald (in Spanish). Miami, Florida. 25 February 2000. Retrieved 14 November 2021 – via Newspapers.com.
  97. ^ Rafael, Dan (1 June 2001). "Barrera, Morales talking rematch". USA Today. Archived from the original on 26 June 2001. Retrieved 15 November 2021.
  98. ^ Pérez, Jorge (14 August 2002). "Destronan a Agapito los médicos". WBA (in Spanish). Archived from the original on 5 November 2002. Retrieved 15 November 2021.
  99. ^ Christ, Scott (6 July 2005). "Valcarcel to file complaint!". Fightnews. Archived from the original on 7 July 2005. Retrieved 15 November 2021.
  100. ^ Christ, Scott (18 November 2011). "Jorge Arce Vacates Title, Donaire vs Vazquez Could Happen For WBO Belt at 122". Bad Left Hook. Archived from the original on 28 December 2011. Retrieved 4 July 2019.
  101. ^ Rafael, Dan (28 October 2015). "WBO strips Guillermo Rigondeaux of a 122-pound belt". ESPN. Archived from the original on 15 January 2018. Retrieved 3 July 2019.
  102. ^ Salazar, Francisco (12 July 2020). "Emanuel Navarrete vacates WBO 122-pound title, will be named mandatory at 126". The Ring. Archived from the original on 15 January 2021. Retrieved 31 May 2021.
  103. ^ "South Texas Boxer sets sights on WBO bantamweight crown". Tyler Morning Telegraph. Tyler, Texas. 20 February 1991. Retrieved 15 November 2021 – via Newspapers.com.
  104. ^ "Futch says Tapia isn't just another in the crowd". The Fresno Bee. Fresno, California. 18 July 1997. Retrieved 15 November 2021 – via Newspapers.com.
  105. ^ "Warren announces 4 cards!". Fightnews. 16 August 2000. Archived from the original on 16 August 2000. Retrieved 23 August 2021.
  106. ^ Nathanielsz, Ronnie (18 May 2009). "Penalosa Lands a Number 2 Spot in The WBO Rankings". Boxingscene. Archived from the original on 20 July 2012. Retrieved 23 August 2021.
  107. ^ Rafael, Dan (23 October 2011). "Donaire wins fight, but no new fans". ESPN. Archived from the original on 28 April 2021. Retrieved 3 August 2021.
  108. ^ "Rankings as of Aug. 15, 2012" (PDF). WBO. Retrieved 28 September 2021.
  109. ^ Rivera, Miguel (21 April 2015). "WBO Shoots Down Kameda-McDonnell Unification". Boxingscene. Archived from the original on 5 August 2021. Retrieved 5 August 2021.
  110. ^ Rivera, Miguel (23 April 2015). "Tomoki Kameda Vacates WBO Belt, Focused on McDonnell". Boxingscene. Archived from the original on 5 August 2021. Retrieved 5 August 2021.
  111. ^ Songalia, Ryan (22 April 2017). "'Dehydrated' Tapales loses WBO bantamweight title on scales". The Ring. Archived from the original on 18 July 2019. Retrieved 17 July 2019.
  112. ^ Songalia, Ryan (3 May 2022). "WBO stripes John Riel Casimero of bantamweight title, elevates Paul Butler to champion". The Ring. Archived from the original on 4 May 2022. Retrieved 4 May 2022.
  113. ^ Songalia, Ryan (13 January 2023). "Naoya Inoue vacates undisputed bantamweight championship, will move up to 122 pounds". The Ring. Archived from the original on 14 January 2023. Retrieved 14 January 2023.
  114. ^ "Comeback Kid claims NABF title". Albuquerque Journal Telegraph. Albuquerque, New Mexico. 16 July 1994. Retrieved 18 November 2021 – via Newspapers.com.
  115. ^ Vester, Mark (9 February 2009). "Fernando Montiel pushing to unify with Vic Darchinyan". Boxingscene. Archived from the original on 18 November 2021. Retrieved 18 November 2021.
  116. ^ Nathanielsz, Ronnie (10 February 2009). "Juanma Lopez-Penalosa Fight Confirmed by Gomez". Boxingscene. Archived from the original on 22 July 2012. Retrieved 18 November 2021.
  117. ^ Christ, Scott (21 November 2009). "Marvin Sonsona drops title on the scales in Ontario". Bad Left Hook. Archived from the original on 6 July 2019. Retrieved 5 July 2019.
  118. ^ "井上尚弥、３階級制覇挑戦 ５月、王者マクドネルと". Sankei Shimbun (in Japanese). 6 March 2018. Archived from the original on 24 August 2021. Retrieved 24 August 2021.
  119. ^ Pamintuan, Carlos (1 March 2019). "Donnie Nietes vacates WBO title, seeks bigger fights". ESPN. Archived from the original on 4 July 2019. Retrieved 5 July 2019.
  120. ^ "Kazuto Ioka vacates WBO world title to rematch WBA champion Franco". Yahoo (in Japanese). 15 February 2023. Archived from the original on 15 February 2023. Retrieved 15 February 2023.
  121. ^ Wainwright, Anson (13 December 2023). "Junto Nakatani drops WBO 115-pound belt, eyes move to bantamweight". The Ring. Archived from the original on 14 December 2023. Retrieved 14 December 2023.
  122. ^ Sáenz, Ludo (11 July 2002). "¡Paco Valcárcel revela planes de la OMB!". Boxing news (in Spanish). Archived from the original on 11 September 2002. Retrieved 28 September 2021.
  123. ^ Nathanielsz, Ronnie (14 May 2010). "Mepranum To Fight For Vacant WBO Flyweight Belt". Boxingscene. Archived from the original on 28 September 2021. Retrieved 28 September 2021.
  124. ^ Rafael, Dan (20 September 2016). "Juan Francisco Estrada vacates 2nd flyweight title, will move up in weight". ESPN. Archived from the original on 11 October 2018. Retrieved 5 July 2019.
  125. ^ "田中恒成がフライ級王座返上 2020年は4階級制覇へ". Boxingnews (in Japanese). 4 February 2020. Archived from the original on 29 November 2020. Retrieved 3 August 2021.
  126. ^ Boxing Bob Newman (27 October 2022). "WBO 35th Annual Convention Final Meetings". WBO. Archived from the original on 29 October 2022. Retrieved 29 October 2022.
  127. ^ Donovan, Jake (29 March 2024). "Jesse 'Bam' Rodriguez relinquishes IBF 112-pound belt; Angel Ayala-David Apolinario title fight ordered". The Ring. Archived from the original on 30 March 2024. Retrieved 30 March 2024.
  128. ^ Rafael, Dan (22 April 2011). "Klitschko, Adamek have venue for fight". ESPN. Archived from the original on 8 September 2016. Retrieved 24 August 2021.
  129. ^ Songalia, Ryan (3 August 2016). "Donnie Nietes vacates 108-pound belt, moves to flyweight". The Ring. Archived from the original on 5 July 2019. Retrieved 5 July 2019.
  130. ^ Koizumi, Joe (30 November 2017). "WBO 108lb champ Tanaka renounces his belt". Fightnews (in Japanese). Archived from the original on 28 April 2021. Retrieved 3 August 2021.
  131. ^ Donovan, Jake (19 June 2024). "Jonathan 'Bomba' Gonzales relinquishes WBO 108-pound title, will campaign at flyweight". The Ring. Archived from the original on 20 June 2024. Retrieved 10 August 2024.
  132. ^ "Weir gives up WBO title". Detroit Free Press. Detroit, Michigan. 16 December 1993. Retrieved 13 July 2019 – via Newspapers.com.
  133. ^ "Accomplished boxer gives WBO belt to dad, loses title". The Dispatch. Moline, Illinois. 20 December 1997. Retrieved 18 November 2021 – via Newspapers.com.
  134. ^ Aznar, Edri (28 February 2011). "Nietes chases another dream". Sunstar. Archived from the original on 2 March 2011. Retrieved 21 August 2021.
  135. ^ Secuya, Dong (19 April 2013). "WBO declares Merlito Sabillo as the new mini-flyweight champion". Philboxing. Archived from the original on 27 May 2013. Retrieved 21 August 2021.
  136. ^ "Rankings as of Dec. 15, 2014" (PDF). WBO. Retrieved 28 September 2021.
  137. ^ Secuya, Dong (3 March 2015). "Katsunari Takayama vacates WBO title, will defend IBF belt on April 22nd as part of Ioka card!". Asianboxing. Archived from the original on 8 November 2020. Retrieved 21 August 2021.
  138. ^ "田中恒成がミニマム級王座返上、年内2階級制覇へ". Boxingnews (in Japanese). 7 April 2016. Archived from the original on 22 October 2020. Retrieved 3 August 2021.
  139. ^ "高山、引退で五輪挑戦へ ＷＢＯミニマム級王者". Sankei Shimbun (in Japanese). 3 April 2017. Archived from the original on 21 August 2021. Retrieved 21 August 2021.
  140. ^ "福原辰弥がWBO正規王者に昇格へ、高山勝成の引退で". Boxingnews (in Japanese). 14 April 2017. Archived from the original on 3 July 2018. Retrieved 21 August 2021.
[edit]
Retrieved from "https://en.wikipedia.org/w/index.php?title=List_of_WBO_world_champions&oldid=1259111661"