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.
Michael Lee Moorer is an American former professional boxer who competed from 1988 to 2008. He won a world championship on four occasions in two weight classes, having held the WBO light heavyweight title from 1988 to 1991; compiling 22 straight KOs in 22 fights and the WBO heavyweight title from 1992 to 1993; the unified WBA, IBF and lineal heavyweight titles in 1994; and regained the IBF heavyweight title again from 1996 to 1997 becoming a three-time heavyweight world champion.
James Nathaniel Toney is an American former professional boxer who competed from 1988 to 2017. He held multiple world championships in three weight classes, including the IBF and lineal middleweight titles from 1991 to 1993, the IBF super middleweight title from 1993 to 1994, and the IBF cruiserweight title in 2003. Toney also challenged twice for a world heavyweight title in 2005 and 2006, and was victorious the first time but was later stripped due to a failed drug test. Overall, he competed in fifteen world title fights across four weight classes.
Terry Wayne Norris is an American former boxer, prized fighter and a Four time world champion in the light-middleweight (super-welterweight) division. Originally from Lubbock, Texas, he fought out of San Diego.
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.
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.
Orlin Levance Norris is an American former professional boxer who competed from 1986 to 2005. He held the WBA cruiserweight title from 1993 to 1995. As an amateur, he won the National Golden Gloves title. He is the brother of retired former champion Terry Norris.
Arthur James Williams was an American former professional boxer who competed between 1989 and 2010. He held the IBF cruiserweight title from 1998 to 1999 and challenged twice for the WBA cruiserweight title in 1994.
Adolpho Washington is a retired professional boxer. He held the IBF cruiserweight title from 1996 until 1997, and challenged twice for WBA world titles at cruiserweight and light heavyweight.
Nate Miller was an American professional boxer who competed from 1986 to 2001.
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.
Petrus Arnoldus Crous is a South African former professional boxer who competed from 1977 to 1987.
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.
James Pritchard is an American former professional boxer who competed from 1985 to 1997. He challenged once for the IBF cruiserweight title in 1991.
Yuniel Dorticós Pao is a Cuban professional boxer. He is a two-time former cruiserweight world champion, having held the WBA title from 2017 to 2018 and the IBF title from 2019 to 2020. As of August 2022, he is ranked as the world's third best active cruiserweight by The Ring magazine and the Transnational Boxing Rankings Board, and sixth by BoxRec.
Denis Aleksandrovich Lebedev is a Russian former professional boxer who competed from 2001 to 2019. He was a unified world cruiserweight champion, having held the WBA title from 2012 to 2018, and the IBF title in 2016.
Lawrence Okolie is a British professional boxer who held the World Boxing Organization (WBO) cruiserweight title from 2021 to May 2023. At regional level, he held the Commonwealth title twice between 2018 and 2019; the British title from 2018 to 2019; and the European title in 2019.
Murat Georgievich Gassiev is a Russian-Armenian professional boxer from North Ossetia-Alania. He is a former unified cruiserweight world champion, having held the IBF title from 2016 to 2018, and the WBA (Unified) title in 2018. As of October 2021, he is ranked as the world's ninth-best active heavyweight by BoxRec.
Arsen Goulamirian is an Armenian-born French professional boxer. He has held the World Boxing Association (WBA) cruiserweight title since 2019. He previously held the WBA cruiserweight title in 2018.
Ryan Rozicki is a Canadian professional boxer who challenged for the WBC bridgerweight title in 2021.
Nate Miller 
Dublin, Ireland
Paradise, Nevada, U.S.
Rochester, New York, U.S.
Doraville, Georgia, U.S.
Mexico City, Mexico
Charlotte, North Carolina, U.S.
Miami, Florida, U.S.
Reinaldo Gimenez
Charleston, South Carolina, U.S.