Lennox Claudius Lewis is a boxing commentator and former professional boxer who competed from 1989 to 2003. He is a three-time world heavyweight champion, a two-time lineal champion, and held the undisputed championship. Holding dual British and Canadian citizenship, Lewis represented Canada as an amateur at the 1984 and 1988 Olympics; in the latter, he won a gold medal in the super-heavyweight division. Lewis is regarded by many as one of the greatest heavyweight boxers of all time, and one of the greatest British fighters of all time.
Heavyweight is a weight class in combat sports and professional wrestling.
Jacob "Baby Jake" Matlala was a South African boxer and junior flyweight champion from Meadowlands, Johannesburg. He won 4 world championship titles. In 2004, Matlala was voted #72 in the "100 Greatest South Africans" poll organized by SABC.
In boxing, the undisputed champion of a weight class is the boxer who simultaneously holds world titles from all major organizations recognized by each other and the International Boxing Hall of Fame. There are currently four major sanctioning bodies: WBA, WBC, WBO, and IBF. There were many undisputed champions before the number of major sanctioning bodies recognizing each other increased to four in 2007, but there have been only 21 boxers to hold all four titles simultaneously.
Professional boxing, or prizefighting, is regulated, sanctioned boxing. Professional boxing bouts are fought for a purse that is divided between the boxers as determined by contract. Most professional fights are supervised by a regulatory authority to guarantee the fighters' safety. Most high-profile bouts obtain the endorsement of a sanctioning body, which awards championship belts, establishes rules, and assigns its own judges and referees.
Sirimongkol Singmanasak is a Thai professional boxer, bare-knuckle boxer and kickboxer. He is a world champion in two weight classes, having held the WBC bantamweight title in 1997 and the WBC super-featherweight title from 2002 to 2003. His other names were Sirimongkol Nakhon Thong Park View, Sirimongkol Singwancha, Sirimongkol Nakornloung, and Sirimongkhon Iamthuam.
Super cruiserweight, is a weight class in combat sports.
The World Boxing Union (WBU) was a boxing sanctioning body. The original WBU was founded in January 1995 by IBF European representative, boxing journalist, actor and former holder of the title of Britain's heaviest man, Jon W. Robinson. It sanctioned boxing with various promoters worldwide. Following Robinson's death in 2004, the organization became dormant and was eventually dissolved.
Adam Braidwood is a Canadian professional boxer, actor, martial artist and retired professional football defensive end.
Willie Limond was a Scottish professional boxer and footballer. He held the EBU European Union super featherweight title in 2004, the Commonwealth lightweight title from 2006 to 2007, the Commonwealth super lightweight title from 2013 to 2014, and the British super lightweight title in 2014.
Merdud Takalobighashi, more commonly known as Merdud Takaloo or Takaloo, is an Iranian born British based boxer.
Martin Rogan is an Irish former professional boxer who competed from 2004 to 2014. At regional level, he held the Commonwealth heavyweight title in 2009; and won the Prizefighter series in 2008.
The Newbridge Boxing Club is a boxing gym operated by Enzo Calzaghe and based in Newbridge in South Wales. The club has been one of the most successful of recent years, at one point in 2007 boasting three genuine world champions in Joe Calzaghe, Enzo Maccarinelli and Gavin Rees. Other fighters of note who have won belts at the club include former Commonwealth light middleweight champion Bradley Pryce and former WBU champion and world title challenger Gary Lockett who retired in Sept 2008.
Lee "Aberdeen Assassin" McAllister is a Scottish professional boxer nicknamed the "Aberdeen Assassin". McAllister held the Commonwealth lightweight and light-welterweight titles, the IBO International light-welterweight title, and challenged once each for the European and British titles. He captured the junior-middleweight WBU World Championship on 5 October 2019 against Richmond Djarbeng by 2nd-round TKO. Lee is also a very successful promoter; Assassins Promotions boxing, which holds events in his hometown of Aberdeen, where he also runs and operates a very prestigious boxing gym called Assassin's Health & Fitness. On 22 July 2018 he fought his most high-profile fight whenever he moved up 5 weight classes and challenged British WBU #1 contender Danny Williams, who beat Mike Tyson, in eerily similar fashion; McAllister dominated Williams and KO'd him in round 10 to become the WBU Heavyweight champion of the world.
Natalia Yurievna Ragozina, better known as Natascha Ragosina, is an undefeated retired Russian professional boxer who spent much of her career ranked as the top female super middleweight in the world.
Gene Pukall is a German former professional boxer who fought in the heavyweight division.
Mark de Mori is an Australian professional boxer, who fights at heavyweight.
George Foreman 
Corrie Sanders 
Johnny Nelson 
Georgi Kandelaki 
Don Diego Poeder 
Vincenzo Cantatore 
Dario Walter Matteoni 
Norbert Nieroba 
Kevin Kelly 
Eugenio Monteiro 
Rashid Matumla 
Takaloo 
Daniel Santos 
Eamonn Magee 
George Scott 
Toncho Tonchev