Evander Holyfield is an American former professional boxer who competed between 1984 and 2011. He reigned as the undisputed champion at cruiserweight in the late 1980s and at heavyweight in the early 1990s, and is the only boxer in history to win the undisputed championship in two weight classes in the three belt era. Nicknamed "the Real Deal", Holyfield is the only four-time world heavyweight champion, having held the unified WBA, WBC, and IBF titles from 1990 to 1992, the WBA and IBF titles again from 1993 to 1994, the WBA title a third time from 1996 to 1999; the IBF title a third time from 1997 to 1999 and the WBA title for a fourth time from 2000 to 2001.
Leon Spinks was an American professional boxer who competed from 1977 to 1995. In only his eighth professional fight, he won the undisputed heavyweight championship in 1978 after defeating Muhammad Ali in a split decision, in what is considered one of the biggest upsets in boxing history. Spinks was later stripped of the WBC title for facing Ali in an unapproved rematch seven months later, which he lost by a unanimous decision.
Antonio Deon Tarver is an American former professional boxer and boxing commentator. In boxing he competed from 1997 to 2015, and held multiple light heavyweight world championships, including the WBA (Unified), WBC, IBF and Ring magazine titles, as well as the IBO light heavyweight and cruiserweight titles.
David Deron Haye is a British former professional boxer who competed between 2002 and 2018. He held multiple world championships in two weight classes, and was the first British boxer to reach the final of the World Amateur Boxing Championships, where he won a silver medal in 2001.
Jean-Marc Gilbert Mormeck is a French former professional boxer who competed from 1995 to 2014. He is a two-time unified world cruiserweight champion, having held the WBA, WBC and The Ring world titles twice between 2005 and 2007. He was the first boxer to hold unified cruiserweight title since Evander Holyfield in 1988, and the first fighter to hold The Ring cruiserweight title since Carlos De León in 1987. He was ranked by BoxRec as the world's top 10 cruiserweight from 2001 to 2005 and in 2007, and was ranked No.1 in 2003 and 2004. Mormeck also challenged for the unified world heavyweight title in 2012.
In professional boxing, the undisputed champion of a weight class is the boxer who simultaneously holds world titles from all sanctioning organisations recognized major by each other and the International Boxing Hall of Fame. There are currently four major sanctioning bodies: WBA, WBC, IBF and WBO. There were many undisputed champions before the number of major sanctioning bodies recognizing each other increased to four in 2007, but there have only been 18 boxers to hold all four titles simultaneously.
Ivanson Ranny "Johnny" Nelson is a British boxing analyst and former professional boxer who competed from 1986 to 2005. He held the World Boxing Organization (WBO) cruiserweight title from 1999 to 2006, and remains the longest reigning cruiserweight world champion of all time. Nelson defended the title against thirteen different opponents, more than any other cruiserweight in history, and holds a joint-record of most consecutive cruiserweight title defences. He also never lost the title in the ring. At regional level, he held the British cruiserweight title twice between 1989 and 1997, and the European cruiserweight title twice between 1990 and 1998.
Enzo Maccarinelli is a retired Welsh former professional boxing world champion who competed from 1999 to 2016. He held the WBO cruiserweight title from 2006 to 2008. At regional level, he held the European and British cruiserweight titles between 2010 and 2012, and the Commonwealth light-heavyweight title in 2013.
Tomasz "Tomek" Adamek is a Polish former professional boxer who competed from 1999 to 2018. He held world championships in two weight classes, including the WBC light heavyweight title from 2005 to 2007, and the IBF and The Ring magazine cruiserweight titles from 2008 to 2009. He also held the IBO cruiserweight title in 2007, and challenged once for the WBC heavyweight title in 2011. BoxRec ranks Adamek as the third greatest Polish boxer of all time, pound for pound. He is the first Polish boxer to win The Ring title.
Carl Martin Froch, is a British former professional boxer who competed from 2002 to 2014, and has since worked as a boxing analyst and commentator. He held multiple super-middleweight world championships, including the World Boxing Council (WBC) title twice between 2008 and 2011, the International Boxing Federation (IBF) title from 2012 to 2015, and the World Boxing Association (WBA) title from 2013 to 2015. At regional level, he held the British and Commonwealth super-middleweight titles between 2004 and 2008, and won the Lonsdale Belt in 2006. As an amateur, in the middleweight division, Froch won a bronze medal at the 2001 World Championships, and the ABA title twice.
Steven Ormain Cunningham is an American professional boxer who held the IBF cruiserweight title twice between 2007 and 2011. His nickname, "USS", is a reference to his US Navy service on the aircraft carriers USS America and USS Enterprise between 1994 and 1998.
Jean-Thenistor Pascal is a Haitian-born Canadian professional boxer. He held the WBA (Regular) light-heavyweight title from 2019 to 2021, and previously the WBC, IBO, Ring magazine and lineal light-heavyweight titles between 2009 and 2011, and challenged once for the WBC super-middleweight title in 2008.
Guillermo Jones is a Panamanian former professional boxer who competed from 1993 to 2017. He held the WBA cruiserweight title from 2008 to 2012, and challenged twice for the WBA super welterweight title in 1998.
Oleksandr Oleksandrovych Usyk is a Ukrainian professional boxer. He has held multiple world championships in two weight classes, including the unified heavyweight titles since 2021, and the Ring magazine title since 2022. He has also held the International Boxing Organization (IBO) title since 2021. Previously, he held the undisputed cruiserweight championship from 2018 to 2019, being the first boxer in that division to hold all four major world titles.
Anthony Lewis Bellew is an English former professional boxer who competed from 2007 to 2018, and has since worked as a boxing analyst and commentator. He held the WBC cruiserweight title from 2016 to 2017, and challenged for the undisputed cruiserweight championship in 2018. At regional level, he held the British and Commonwealth light-heavyweight titles between 2010 and 2014, the European cruiserweight title from 2015 to 2016, and is a three-time ABA heavyweight champion as an amateur. He portrayed antagonist boxer Ricky Conlan in the films Creed and Creed III.
Bernard Hopkins Jr. is an American former professional boxer who competed from 1988 to 2016. He is one of the most successful boxers of the past three decades, having held multiple world championships in two weight classes, including the undisputed middleweight title from 2001 to 2005, and the lineal light heavyweight title from 2011 to 2012.
Ernest Mateen, nicknamed 'M-16', was a United States and IBU Cruiserweight (boxing) champion. He was shot to death by his wife in a case of probable self-defense.
Jai Opetaia is an Australian professional boxer. He held the International Boxing Federation (IBF) from 2022 until December 2023. He currently holds the Ring magazine and lineal cruiserweight titles. As an amateur, he won a bronze medal at the 2012 Youth World Championships and represented Australia at the 2012 Olympics and 2014 Commonwealth Games. As of February 2023, Opetaia is ranked the world's best active cruiserweight by The Ring magazine, and the Transnational Boxing Rankings Board, second by BoxRec, and third best by ESPN.
Josh Taylor is a Scottish professional boxer. He is a former undisputed super lightweight champion, having held the International Boxing Federation (IBF) and World Boxing Association (WBA) titles between 2019 and 2022, the World Boxing Council (WBC) title between 2021 and 2022, the World Boxing Organisation (WBO) title between 2021 and 2023 and the Ring magazine title between 2019 and 2023. At regional level, he held the Commonwealth light-welterweight title from 2016 to 2017. As an amateur, he won a lightweight silver medal at the 2010 Commonwealth Games and light-welterweight gold at the 2014 edition.
David Light is a New Zealand professional boxer. As an amateur, he competed in the men's heavyweight division at the 2014 Commonwealth Games in Glasgow where he won the silver medal against Canada's Samir El-Mais. Professionally, Light is a former WBO World Crusierweight title contender, where he fought Lawrence Okolie in March 2023.
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