List of boxing quadruple champions explained

A quadruple champion in boxing refers to a boxer who has won world titles in four different categories of weight.

Recognition

Major sanctioning bodies

There is some dispute on which sanctioning body is considered "major" enough to award championships. The "Big 4" sanctioning bodies are always included. They are arranged in order of foundation:

• World Boxing Association (WBA) - founded in 1921
• World Boxing Council (WBC) - founded in 1963
• International Boxing Federation (IBF) - founded in 1976
• World Boxing Organization (WBO) - founded in 1988

The Ring

The Ring, boxing's most respected magazine, has awarded world championships in professional boxing within each weight class from its foundation in 1922 until the 1990s, and again since 2001. The Ring champions were at one point held the linear reign to the throne, the man who beat the man. The lineal champion is also known as the true champion of the division. The Ring stopped giving belts to world champions in the 1990s but began again in 2002.

In 2002, The Ring attempted to clear up the confusion regarding world champions by creating a championship policy. It echoed many critics' arguments that the sanctioning bodies in charge of boxing championships had undermined the sport by pitting undeserving contenders against undeserving "champions", and forcing the boxing public to see mismatches for so-called "world championships". The Ring attempted to clear up the confusion regarding world champions by creating a championship policy that is "intended to reward fighters who, by satisfying rigid criteria, can justify a claim as the true and only world champion in a given weight class." The Ring claims to be more authoritative and open than the sanctioning bodies' rankings, with a page devoted to full explanations for ranking changes. A fighter pays no sanctioning fees to defend or fight for the title at stake, contrary to practices of the sanctioning bodies. Furthermore, a fighter cannot be stripped of the title unless he loses, decides to move to a different weight division, or retires.

There are currently only two ways that a boxer can win The Rings title: defeat the reigning champion; or win a box-off between the magazine's number-one and number-two rated contenders (or, sometimes, number-one and number-three rated). A vacant Ring championship is filled when the number-one contender in a weight-division battles the number-two contender or the number-three contender (in cases where The Ring determines that the number-two and number-three contenders are close in abilities and records).

In May 2012, citing the number of vacancies in various weight classes as primary motivation, The Ring unveiled a new championship policy. Under the new policy, The Ring title can be awarded when the No. 1 and No. 2 fighters face one another or when the Nos. 1 and 2 contenders choose not to fight one another and either of them fights No. 3, No. 4 or No. 5, the winner may be awarded The Ring belt. In addition, there are now six ways for a fighter to lose his title: lose a fight in his championship weight class; move to another weight class; not schedule a fight in any weight class for 18 months; not schedule a fight in his championship weight class for 18 months, even if fighting at another weight class; not scheduling a fight with a top 5 contender in any weight class for two years; or retiring.

Many media outlets and members are extremely critical of the new championship policy and state that if this new policy is followed The Ring title will lose the credibility it once held.

Lineal

The Transnational Boxing Rankings Board (TBRB) hands out the official version of the lineal championship. TBRB awards vacant championships when the two top-ranked fighters in any division meet and currently recognizes legitimate world champions or "true champions" each weight classes. The Board was formed to continue where The Ring "left off" in the aftermath of its purchase by Golden Boy Promotions in 2007 and the following dismissal of Nigel Collins. After the new editors announced a controversial new championship policy in May 2012, three prominent members of the Ring Advisory Panel resigned. This three members (Springs Toledo, Cliff Rold and Tim Starks) became the founding members of the Transnational Boxing Rankings Board, which was formed over the summer of 2012 with the assistance of Stewart Howe of England.

Since 2012, lineal champions are predetermined by the Transnational Boxing Rankings Board, which promotes the concept of a singular world champion per weight class.^[1] Lineal champions are listed on Cyber Boxing Zone website which list lineal champions of the Queensberry Era to date.^[2]

Minor sanctioning bodies

They are: International Boxing Organization (IBO), World Professional Boxing Federation (WPBF), International Boxing Association (IBA), International Boxing Council (IBC), International Boxing Board (IBB), International Boxing League (IBL), International Boxing Union (IBU), Global Boxing Association (GBA), Global Boxing Council (GBC), Global Boxing Federation GBF, Global Boxing Organization (GBO), Global Boxing Union (GBU), National Boxing Association (NBA), Transcontinental World Boxing Association (TWBA), Universal Boxing Association (UBA), Universal Boxing Council (UBC), Universal Boxing Federation (UBF), Universal Boxing Organization (UBO), UNIBOX, United States Boxing Council (USBC), World Athletic Association (WAA), World Boxing Board (WBB), World Boxing Championship Committee (WBCC), World Boxing Foundation (WBFo), World Boxing Institute (WBI), World Boxing League (WBL), World Boxing Network (WBN), World Boxing Union (WBU).

Note:

• The International Boxing Association (IBA) is not to be confused with the International Boxing Association (AIBA), a French acronym for Association Internationale de Boxe Amateur, which sanctions amateur matches.
• The National Boxing Association (NBA) was established in 1984 and is not to be confused with the original National Boxing Association that was established in 1921 and changed its name to World Boxing Association (WBA) in 1962.

List of men's quadruple champions

This list is credited for boxers who have won championships in boxing from major sanctioning bodies (WBA, WBC, IBF, WBO), The Ring.

WBA has four recognized world champions, Super, Undisputed, Unified, and Regular. The highest tier title is considered the primary champion of the division. Only boxers who are in the primary champion lineage are listed.

The ranking of WBA's primary champions are as follows:

• Super/Undisputed
• Unified
• Regular

bgcolor=#ece4ec width=5px		Inducted into the International Boxing Hall of Fame
	World Titles from The Ring
‡	WBA Regular Champion as primary title because WBA Super, Undisputed, and Unified is vacant/vacated during his title reign.

No.	Name	Titles	Date	Opponent	Result
1	Thomas Hearns^[3]		Aug 2, 1980	Pipino Cuevas	TKO 2/15
			Dec 3, 1982	Wilfred Benítez	MD 15/15
			Mar 7, 1987	Dennis Andries	TKO 10/12
			Oct 29, 1987	Juan Domingo Roldán	KO 4/12
			Mar 6, 1991	Virgil Hill	UD 12/12
2	Sugar Ray Leonard^[4]				TKO 15/15
	WBC Welterweight  - (2)	Nov 25, 1980	Roberto Durán	TKO 8/15
	The Ring Welterweight  - (2)
		Jun 25, 1981		TKO 9/15
		Sep 16, 1981	Thomas Hearns	TKO 14/15
		Apr 6, 1987		SD 12/12
		Nov 7, 1988		TKO 9/12
3	Roberto Durán^[5]		Jun 26, 1972		TKO 13/15
			Jan 21, 1978	Esteban de Jesús	TKO 12/15
			Jun 20, 1980		UD 15/15
			Jun 16, 1983		TKO 8/15
			Feb 24, 1989		SD 12/12
4	Pernell Whitaker^[6]		Feb 18, 1989		UD 12/12
			Aug 20, 1989		UD 12/12
		The Ring Lightweight
			Aug 11, 1990	Juan Nazario	KO 1/12
			Jul 18, 1992		UD 12/12
			Mar 6, 1993	James McGirt	UD 12/12
			Mar 4, 1995	Julio César Vásquez	UD 12/12
5	Oscar De La Hoya^[7]		Mar 5, 1994	Jimmy Bredahl	TKO 10/12
			Feb 18, 1995	John-John Molina	UD 12/12
			May 6, 1995	Rafael Ruelas	TKO 2/12
			Jun 7, 1996		TKO 4/12
			Apr 12, 1997		UD 12/12
		WBC Welterweight  - (2)	Mar 21, 2000	align=center colspan=2	No. 1 contender promoted^[8]
6	Leo Gámez^[9]		Jan 10, 1988	Kim Bong Jun	UD 12/12
			Oct 21, 1993	Shiro Yahiro	TKO 9/12
			Mar 13, 1999		KO 3/12
			Oct 9, 2000		KO 7/12
7	Roy Jones Jr.^[10]		May 22, 1993		UD 12/12
		Oct 21, 1993		UD 12/12
		Jan 13, 1997	align=center colspan=2	Interim promoted^[11]
	WBC Light heavyweight  - (2)	Aug 7, 1997		KO 1/12
	WBC Light heavyweight  - (3)	Jun 1998	align=center colspan=2	Reinstated
	WBA Light heavyweight,	Jul 18, 1998	Lou Del Valle	UD 12/12
		Dec 2000
		Aug 5, 2002
		Jun 5, 1999	Reggie Johnson	UD 12/12
		2001	Awarded
		Mar 1, 2003		UD 12/12
	WBA (Unified) Light heavyweight  - (2)	Nov 8, 2003		UD 12/12
	WBC Light heavyweight  - (4)
8	Floyd Mayweather Jr.^[12]		Oct 3, 1998		RTD 8/12
		Apr 20, 2002		UD 12/12
	WBC Light welterweight	Jun 25, 2005	Arturo Gatti	TKO 6/12
		Apr 8, 2006	Zab Judah	UD 12/12
	WBC Welterweight	Nov 4, 2006		UD 12/12
	WBC Welterweight  - (2)	Dec 17, 2011	Victor Ortiz	KO4/12
	The Ring Welterweight  - (2)	May 4, 2013	Robert Guerrero	UD 12/12
		May 3, 2014	Marcos Maidana	MD 12/12
		May 2, 2015	Manny Pacquiao	UD 12/12
9	Manny Pacquiao^[13]		Dec 4, 1998		KO 8/12
			Jun 23, 2001		KO 6/12
			Nov 15, 2003	Marco Antonio Barrera	TKO 11/12
			Mar 15, 2008		SD 12/12
10	Érik Morales^[14]		Sep 6, 1997		KO 11/12
			Feb 19, 2000		SD 12/12
			Feb 17, 2001		UD 12/12
		WBC Featherweight  - (2)	Nov 16, 2002		UD 12/12
			Feb 28, 2004		UD 12/12
			Jul 31, 2004	Carlos Hernández	UD 12/12
			Sep 17, 2011		TKO 10/12
11	Jorge Arce^[15]		Dec 5, 1998	Juan Domingo Cordoba	UD 12/12
			Jul 6, 2002	Choi Yo-sam	TKO 6/12
			Jan 30, 2010	Angky Angkotta	TD 7/12
			May 7, 2011	Wilfredo Vazquez, Jr.	TKO 12/12
			Nov 26, 2011	Angky Angkotta	UD 12/12
12	Juan Manuel Márquez^[16]		Feb 1, 2003			TKO 7/12
		Nov 1, 2003	Derrick Gainer	TD 7/12
	WBO Featherweight (Interim)	Dec 6, 2006	align=center colspan=2	Interim promoted^[17]
		Mar 17, 2007			UD 12/12
		Sep 13, 2008		TKO 11/12
		Feb 28, 2009		TKO 9/12
	WBO Light welterweight (Interim)	Jun 28, 2012	align=center colspan=2	Interim promoted^[18]
13	Nonito Donaire^[19]		Jul 7, 2007			TKO 5/12
	WBC Bantamweight	Feb 19, 2011	Fernando Montiel	KO 2/12
		Feb 4, 2012		SD 12/12
		Jul 7, 2012		UD 12/12
	The Ring Super bantamweight	Oct 13, 2012		TKO 9/12
		May 31, 2014			TD 5/12
	WBO Super bantamweight  - (2)	Dec 11, 2015	Cesar Juarez	UD 12/12
		Nov 3, 2018	Ryan Burnett	RTD 4/12
	WBC Bantamweight  - (2)	May 29, 2021	Nordine Oubaali	KO 4/12
14	Miguel Cotto^[20]		Sep 11, 2004			TKO 6/12
			Dec 2, 2006			RTD 5/12
			Feb 21, 2009			TKO 5/12
			Jun 5, 2010		TKO 9/12
		Oct 15, 2010	align=center colspan=2	Regular promoted^[21]
			Jun 7, 2014		RTD 9/12
			Aug 26, 2017	Yoshihiro Kamegai	UD 12/12
15	Adrien Broner^[22]		Nov 26, 2011		KO 3/12
			Nov 17, 2012		TKO 8/12
			Jun 22, 2013		SD 12/12
		WBA (Regular) Light welterweight	Oct 3, 2015		TKO 12/12
		Nov 5, 2015	align=center colspan=2	Regular promoted^[23]
16	Román González^[24]		Sep 15, 2008		TKO 4/12
		Feb 5, 2011	align=center colspan=2	Interim promoted^[25]
		Nov 30, 2012	align=center colspan=2	Regular promoted^[26]
		Sep 5, 2014		TKO 9/12
		Sep 11, 2016		UD 12/12
		Feb 29, 2020		TKO 9/12
17	Mikey Garcia^[27]		Jan 19, 2013		TD 9/12
			Nov 9, 2013			KO 8/12
			Jan 28, 2017		KO 3/12
			Mar 20, 2018		UD 12/12
			Jul 28, 2018	Robert Easter Jr.	UD 12/12
18	Donnie Nietes^[28]		Sep 7, 2007		UD 12/12
			Oct 8, 2011			UD 12/12
			May 10, 2014		TKO 9/12
			Apr 29, 2017		UD 12/12
			Dec 31, 2018		SD 12/12
19	Kazuto Ioka^[29]		Feb 11, 2011		TKO 5/12
			Jun 20, 2012	Akira Yaegashi	UD 12/12
		WBA (Regular) Light flyweight	Jan 14, 2014	align=center colspan=2	Primary champion vacant
		WBA (Regular) Flyweight	Sep 14, 2016	align=center colspan=2	Primary champion vacant
			Jun 19, 2019		TKO 10/12
			Jun 24, 2023		UD 12/12
20	Léo Santa Cruz^[30]		Jun 2, 2012		UD 12/12
		Aug 24, 2014			TKO 3/12
		Aug 29, 2015		MD 12/12
	WBA (Super) Featherweight – (2)	Jul 30, 2016		MD 12/12
		Nov 23, 2019		UD 12/12
21	Canelo Álvarez^[31]		Mar 5, 2011		UD 12/12
			Apr 20, 2013				UD 12/12
		Nov 21, 2015		UD 12/12
		Sep 17, 2016	Liam Smith	KO 9/12
		Sep 15, 2018	Gennady Golovkin	MD 12/12
	WBC Middleweight  - (2)
	The Ring Middleweight  - (2)
		May 4, 2019	Daniel Jacobs	UD 12/12
		Nov 2, 2019		KO 11/12
		Dec 19, 2020	Callum Smith	UD 12/12
		May 8, 2021	Billy Joe Saunders	RTD 8/12
		Nov 6, 2021	Caleb Plant	TKO 11/12
22	Naoya Inoue^[32]		Apr 6, 2014		TKO 6/12
		WBO Super flyweight	Dec 30, 2014		KO 2/12
		WBA (Unified) Bantamweight	May 25, 2018	Jamie McDonnell	KO 1/12
		IBF Bantamweight	May 18, 2019		KO 2/12
		The Ring Bantamweight
			Nov 7, 2019	Nonito Donaire	UD 12/12
			Jun 7, 2022		TKO 2/12
			Dec 13, 2022	Paul Butler	KO 11/12
			Jul 25, 2023	Stephen Fulton	TKO 8/12
			Dec 26, 2023	Marlon Tapales	KO 10/12
23	Kosei Tanaka^[33]		May 30, 2015	Julian Yedras	UD 12/12
			Dec 31, 2016			TKO 5/12
			Sep 24, 2018			MD 12/12
			Feb 24, 2024	Christian Bacasegua		UD 12/12
24	Terence Crawford^[34]		Mar 1, 2014		UD 12/12
			Nov 29, 2014		UD 12/12
			Apr 18, 2015		TKO 6/12
			Jul 23, 2016		UD 12/12
			Aug 19, 2017	Julius Indongo	KO 3/12
			Jun 9, 2018		TKO 9/12
			Jul 29, 2023	Errol Spence Jr.	TKO 9/12
			Aug 3, 2024		UD 12/12

Note

• Dates in bold format signify the date when they won their 4th division title.
• Interim titles are not included unless it gets promoted to the official title.
• Any WBA titles won before the titles are fragmented in the division are not marked as Super, Undisputed, Unified, or Regular.
• In August 2021, the WBA has started recognizing a single champion per division as part of their title reduction plan. World titles won after the plan will not be marked as Regular.

List of women’s quadruple champion

The following is a list of women’s quadruple champions who have held titles from one or more of the "Big Four" organizations (WBA, WBC, IBF, WBO) and The Ring.

World Titles from The Ring

No.	Name	Titles	Date	Opponent	Result
1	Amanda Serrano^[35]		Sep 10, 2011	Kimberly Connor	TKO 2/10
	WBO Lightweight	Aug 15, 2014	Maria Elena Maderna	KO 6/10
		Feb 17, 2016	Olivia Gerula	TKO 1/10
		Oct 18, 2016	Alexandra Lázár	TKO 5/10
	WBO Featherweight – (2)	Sep 13, 2019	Heather Hardy	UD 10/10
		Feb 4, 2021	Interim promoted^[36]
	IBF Featherweight	Sep 24, 2022	Sarah Mahfoud	UD 10/10
	WBA Featherweight	Feb 4, 2023	Erika Cruz	UD 10/10
2	Naoko Fujioka^[37]		May 8, 2011	Anabel Ortiz	RTD 8/10
		WBA Super flyweight	Nov 13, 2013	Naoko Yamaguchi	UD 10/10
			Oct 19, 2015	Hee Jung Yuh	UD 10/10
		WBA Flyweight	Mar 13, 2017	Isabel Millan	Knockout	TKO 10/10
3	Hanna Gabriels^[38]		Dec 19, 2009	Gabriela Marcela Zapata	KO 4/10
		WBO Light middleweight	May 9, 2010	Gardy Pena Alvarez	TKO 1/10
		WBO Light middleweight – (2)	Dec 20, 2014	Paty Ramirez	TKO 2/10
			Jun 18, 2016	Katia Alvariño	TKO 3/10
		WBA Light heavyweight	Apr 17, 2021	Martha Gaytán	TKO 2/10
		WBC Heavyweight
4	Claressa Shields^[39]		Aug 4, 2017	Nikki Adler	TKO 5/10
			Jun 22, 2018	Hanna Gabriel	UD 10/10
			Nov 17, 2018	Hannah Rankin	UD 10/10
			Apr 13, 2019	Christina Hammer	UD 10/10
			Jan 10, 2020	Ivana Habazin	UD 10/10
			Mar 5, 2021	Marie-Eve Dicaire	UD 10/10
		WBO Middleweight – (2)	Oct 15, 2022	Savannah Marshall	UD 10/10
		WBO Light heavyweight	Jul 27, 2024	Vanessa Lepage-Joanisse	TKO 7/10

Note

• Dates in bold format signify the date when they won their 4th division title.
• Interim titles are not included unless they get promoted to the official champion.

Only four division champion in the original eight weight classes

In the entire history of boxing, only Manny Pacquiao has successfully conquered four divisions in the original eight weight classes.

No.	Name	Titles	Date	Opponent	Result
1	Manny Pacquiao^[40]		Dec 4, 1998		KO 8/12
		Nov 15, 2003		TKO 11/12
		Jun 28, 2008	David Díaz	TKO 9/12
		Nov 14, 2009	Miguel Cotto	TKO 12/12
	WBO Welterweight  - (2)	Apr 12, 2014	Timothy Bradley	UD 12/12
	WBO Welterweight  - (3)	Nov 5, 2016	Jessie Vargas	UD 12/12
		Jul 20, 2019	Keith Thurman	SD 12/12

Note

• Dates in bold format signify the date when they won their 4th division title.

Quadruple champions that won titles in other multiple divisions

Some fighters of this group or club were not satisfied to win just the incredible milestone of championships in four different weight divisions but to reach immortality in five, six and/or seven other different divisions or categories. The multiple champions who won titles in:

• Five divisions are called Quintuple champions (see the List of boxing quintuple champions);
• Six divisions are called Sextuple champions (see the List of boxing sextuple champions);
• Seven divisions are called Septuple champions (see the List of boxing septuple champions); and
• Eight divisions are called Octuple champions

See also

• List of current world boxing champions
• List of boxing triple champions
• List of boxing quintuple champions
• List of boxing sextuple champions
• List of boxing septuple champions
• Octuple champion
• List of WBA world champions
• List of WBC world champions
• List of IBF world champions
• List of WBO world champions
• List of The Ring world champions

External links

• • Boxing Records
• Saddoboxing
  • • Cyberboxingzone
• Transnational Boxing Rankings Board
  • News: Manny Pacquiao's attempt on a fifth world title in as many divisions . The Telegraph . https://web.archive.org/web/20080701045914/http://www.telegraph.co.uk/sport/main.jhtml?view=DETAILS&grid=&xml=/sport/2008/06/28/uobox128.xml . dead . 2008-07-01 . 2008-06-28.
  • Manny Pacquiao's Five Best Performances
• Pacquiao Aims for Four (and Six): Real History Part 1, Part 2, Part 3
• http://forums.doghouseboxing.com/lofiversion/index.php/t140155.html

Notes and References

1. Web site: A PURIST VIEW: THE TRUE LINEAL CHAMPION . 2018-09-06 . FIGHT VIEW 360 . 2019-09-23 . 2019-09-22 . https://web.archive.org/web/20190922130059/http://fightview360.com/a-purist-view-the-true-lineal-champion/ . live.
2. Web site: What the CBZ Means When it Refers to "Lineal Championships" . DeLisa . Mike . August 2004 . The CBZ Journal . cyberboxingzone . August 12, 2013 . November 6, 2013 . https://web.archive.org/web/20131106001755/http://www.cyberboxingzone.com/boxing/w0804-lineal.html . live.
3. Web site: Thomas Hearns . Boxrec.com . 2008-03-05 . 2012-09-23 . https://web.archive.org/web/20120923133421/http://boxrec.com/list_bouts.php?human_id=303&cat=boxer . dead.
4. Web site: Sugar Ray Leonard . Boxrec.com . 2008-03-05 . 2015-04-02 . https://web.archive.org/web/20150402163909/http://boxrec.com/list_bouts.php?human_id=269&cat=boxer . dead.
5. Web site: Roberto Durán . Boxrec.com . 2009-12-30 . 2015-03-27 . https://web.archive.org/web/20150327143623/http://boxrec.com/list_bouts.php?human_id=80&cat=boxer . dead.
6. Web site: Pernell Whitaker . Boxrec.com . 2009-12-30 . 2012-07-20 . https://archive.today/20120720063604/http://boxrec.com/list_bouts.php?human_id=000555&cat=boxer . dead.
7. Web site: Oscar De La Hoya . Boxrec.com . 2008-03-05 . 2012-10-03 . https://web.archive.org/web/20121003081026/http://www.boxrec.com/list_bouts.php?human_id=8253&cat=boxer . dead.
8. News: 21 March 2000 . WBC declares de la Hoya welterweight champion . The Independent . live . 29 September 2021 . https://archive.today/20210929125503/https://www.independent.co.uk/sport/general/wbc-declares-de-la-hoya-welterweight-champion-283460.html . 29 September 2021.
9. Web site: Leo Gomez . Boxrec.com . 2009-12-30 . 2012-06-12 . https://web.archive.org/web/20120612085000/http://boxrec.com/list_bouts.php?human_id=000517&cat=boxer . dead.
10. Web site: Roy Jones Jr. . Boxrec.com . 2009-12-30 . 2015-06-10 . https://web.archive.org/web/20150610013143/http://boxrec.com/list_bouts.php?human_id=1758&cat=boxer . dead.
11. News: . 20 February 1997 . Jones vacates title to defend another . Pensacola News Journal . Pensacola, Florida . 4 October 2021 . Newspapers.com . subscription . 4 October 2021 . https://web.archive.org/web/20211004150142/https://www.newspapers.com/image/268514601/ . live.
12. Web site: Floyd Mayweather Jr. . Boxrec.com . 2008-03-05 . 2012-09-19 . https://web.archive.org/web/20120919210539/http://boxrec.com/list_bouts.php?human_id=352&cat=boxer . dead.
13. Web site: Manny Pacquiao . Boxrec.com . 2008-06-29 . 2012-09-19 . https://web.archive.org/web/20120919210643/http://boxrec.com/list_bouts.php?human_id=6129&cat=boxer . dead.
14. Web site: Érik Morales . Boxrec.com . 2011-11-06 . 2015-06-17 . https://web.archive.org/web/20150617010100/http://boxrec.com/list_bouts.php?human_id=5065&cat=boxer . dead.
15. Web site: Jorge Arce . Boxrec.com . 2011-11-27 . 2015-04-01 . https://web.archive.org/web/20150401091239/http://boxrec.com/list_bouts.php?human_id=006642&cat=boxer . dead.
16. Web site: Juan Manuel Márquez . Boxrec.com . 2012-05-08 . 2024-05-25 . https://archive.today/20240525112746/https://www.webcitation.org/60wGP1Jmp?url=http://boxrec.com/list_bouts.php%3Fhuman_id=12222 . dead.
17. News: . 6 December 2006 . Harrison pulls out of featherweight fight vs. Cook . live . ESPN . Associated Press . https://web.archive.org/web/20190704202226/https://www.espn.com/sports/boxing/news/story?id=2689021 . 4 July 2019 . 4 July 2019.
18. News: Rafael . Dan . 28 June 2012 . Timothy Bradley Jr. stays at 147 . live . ESPN . https://web.archive.org/web/20210422185101/https://www.espn.com/boxing/story/_/id/8103247/timothy-bradley-jr-stays-147-keep-wbo-welterweight-belt . 22 April 2021 . 4 June 2021.
19. Web site: Nonito Donaire . Boxrec.com . 2012-02-14 . 2015-06-17 . https://web.archive.org/web/20150617035951/http://boxrec.com/list_bouts.php?human_id=48243&cat=boxer . dead.
20. Web site: Miguel Cotto . Boxrec.com . 2014-06-08 . 2015-05-12 . https://web.archive.org/web/20150512144422/http://boxrec.com/list_bouts.php?human_id=033535&cat=boxer . dead.
21. Web site: Official ratings as of September 2010 . 15 October 2010 . WBA . 10 August 2021 . 10 August 2021 . https://web.archive.org/web/20210810124134/https://www.wbaboxing.com/wp-content/uploads/rankings/2010-september.pdf . live.
22. Web site: Adrien Broner . Boxrec.com . 2014-06-08 . 2015-05-12 . https://web.archive.org/web/20150512144422/http://boxrec.com/list_bouts.php?human_id=033535&cat=boxer . dead.
23. News: Ecksel . Robert . 5 November 2015 . Adrien Broner Declared WBA Super Champion . live . WBA . https://web.archive.org/web/20190912233303/http://www.wbaboxing.com/boxing-news/adrien-broner-declared-wba-super-champion . 12 September 2019 . 4 June 2021.
24. Web site: Román González . Boxrec.com . 2016-09-11 . 2017-07-28 . https://web.archive.org/web/20170728140440/http://boxrec.com/boxer/319725 . dead.
25. News: Thyme . Julio . 5 February 2011 . Gonzalez is king after Reveco drops WBA belt . live . WBA . https://web.archive.org/web/20210122031507/https://www.wbaboxing.com/boxing-news/gonzalez-is-king-after-reveco-drops-wba-belt . 22 January 2021 . 4 June 2021.
26. News: . 30 November 2012 . "Chocolatito" González will be promoted to Super Champion . WBA . WBA . live . https://web.archive.org/web/20210604132716/https://www.wbaboxing.com/boxing-news/chocolatito-gonzalez-will-be-promoted-to-super-champion . 4 June 2021 . 4 June 2021.
27. Web site: Mikey Garcia . Boxrec.com . 2018-07-16 . 2017-08-13 . https://web.archive.org/web/20170813105918/http://boxrec.com/en/boxer/364679 . dead.
28. Web site: Donnie Nietes . Boxrec.com . 2018-12-31 . 2019-04-28 . https://web.archive.org/web/20190428142250/http://boxrec.com/en/boxer/215599 . dead.
29. Web site: Kazuto Ioka . Boxrec.com . 2019-08-25 . 2019-06-24 . https://web.archive.org/web/20190624185214/http://boxrec.com/en/boxer/483786 . dead.
30. Web site: Leo Santa Cruz . Boxrec.com . 2020-12-31 . 2021-01-05 . https://web.archive.org/web/20210105032121/https://boxrec.com/en/proboxer/374624 . dead.
31. Web site: Saul Alvarez . Boxrec.com . 2019-12-21 . 2021-02-21 . https://web.archive.org/web/20210221130902/https://boxrec.com/en/proboxer/348759 . dead.
32. Web site: Naoya Inoue. registration. Boxrec.com. 2021-01-22. 2020-11-17. https://web.archive.org/web/20201117232834/https://boxrec.com/en/proboxer/628407. live.
33. Web site: Kosei Tanaka. registration. Boxrec.com. 2021-01-22. 2021-02-02. https://web.archive.org/web/20210202130826/https://boxrec.com/en/proboxer/666339. live.
34. Web site: Terence Crawford. registration. Boxrec.com. 2021-01-22. 2021-01-15. https://web.archive.org/web/20210115143356/https://boxrec.com/en/proboxer/447121. live.
35. Web site: Amanda Serrano . Boxrec.com . 2021-01-29 . 2021-07-20 . https://web.archive.org/web/20210720125617/https://boxrec.com/en/proboxer/488530 . dead.
36. News: Amanda Serrano Upgraded To WBC Featherweight Titlist, Mrdjenovich Named 'Emeritus Champion' . Boxingscene . 2021-05-04 .
37. Web site: Naoko Fujioka . Boxrec.com . 2021-01-29 . 2020-11-26 . https://web.archive.org/web/20201126155029/https://boxrec.com/en/proboxer/511921 . dead.
38. Web site: Hanna Gabriels . Boxrec.com . 2021-08-23 . 2020-12-14 . https://web.archive.org/web/20201214091024/https://boxrec.com/en/proboxer/430794 . dead.
39. Web site: Claressa Shields. registration. Boxrec.com. 2021-01-29. 2021-01-30. https://web.archive.org/web/20210130050952/https://boxrec.com/en/proboxer/777865. live.
40. Web site: Manny Pacquiao . Boxrec.com . 2008-06-29 . 2012-09-19 . https://web.archive.org/web/20120919210643/http://boxrec.com/list_bouts.php?human_id=6129&cat=boxer . dead.