Thomas Hearns is an American former professional boxer who competed from 1977 to 2006. Nicknamed the "Motor City Cobra", and more famously "The Hitman", Hearns's tall, slender build and oversized arms and shoulders allowed him to move up over fifty pounds in his career and become the first boxer in history to win world titles in five weight divisions: welterweight, light middleweight, middleweight, super middleweight and light heavyweight.
Ezzard Mack Charles, known as the Cincinnati Cobra, was an American professional boxer and World Heavyweight Champion, known for his slick defense and precision. Often regarded as the greatest light heavyweight of all time, Charles defeated numerous Hall of Fame fighters in three different weight classes. Charles retired with a record of 95-25-1. He was posthumously inducted into the International Boxing Hall of Fame in the inaugural class of 1990.
Light heavyweight, is a weight class in combat sports.
Tommy Ryan was an American-Canadian World Welterweight and World Middleweight boxing champion who fought from 1887 to 1907. His simultaneously holding records in both weight classes was a rare and impressive feat for a boxer. His record is a topic that has been up for debate for decades. As of May 2021, Boxrec.com lists his official record as 82–2–13 (68KO). The International Boxing Hall of Fame lists his record as 86–3–6 (22KO). Others list his record anywhere from 86–3–6 (68KO), to 90–6–11 (70KO), to 84–2–11 (70KO). Some historians have even speculated that he held closer to 90 knockouts. Ryan was posthumously inducted into the International Boxing Hall of Fame in the class of 1991.
Leatitia Robinson an American professional boxer who held the IWBF middleweight title from 2002 to 2004 and the WIBA middleweight title from 2004 to 2006.
Isufu "Ike" Quartey is a Ghanaian former professional boxer who competed from 1988 to 2006. He held the WBA welterweight title from 1994 to 1998, and challenged once for IBF junior-middleweight title in 2000.
Chris Omar Johnson is a Jamaican-born boxer, who won a middleweight bronze medal at the 1992 Summer Olympics for Canada. He won the middleweight gold medal at the 1990 Commonwealth Games. He was inducted into Boxing Canada’s Hall of Fame, Class of 2019.
Éric Lucas is a Canadian former professional boxer.
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.
Frank Klaus was an American boxer from 1904 to 1918. Known as the Braddock Bearcat, Klaus claimed the vacant World Middleweight Championship in 1913 and was elected to the Ring Boxing Hall of Fame in 1974.
Lucien Pierre Brouillard, better known as Lou Brouillard,, was a Canadian professional boxer who held the World Welterweight Title and a version of the World Middleweight Title. Statistical boxing website BoxRec ranks Brouillard as the 14th best middleweight of all-time and the 3rd best Canadian boxer ever. During his career he faced the likes of Mickey Walker, Young Corbett III, Jimmy McLarnin, Marcel Thil, and Fred Apostoli. Brouillard was inducted into the World Boxing Hall of Fame in 2000 and the International Boxing Hall of Fame in 2006.
George Gardiner was a famous Irish boxer in America who was the first undisputed World Light Heavyweight Champion. He held claims to both the World Middleweight Title as well as the World Heavyweight Title. He was the second man in history to hold the World's Light Heavyweight title, defeating the first Light Heavyweight Champion, Jack Root, by KO after 12 rounds.
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.
"Lightning" Joe Gatti is a Canadian former professional boxer who competed from 1987 to 2002. He challenged twice for world championships; the WBC super welterweight title in 1993 and the IBF super middleweight title in 2002. He is the older brother of former two-division world champion of boxing, Arturo Gatti.
Joel Díaz is a Mexican former professional boxer. He is the brother of Antonio Díaz and former world champion Julio Díaz.
Savannah Rose Marshall is a British professional boxer. She has held world championships in two weight classes: the undisputed and Ring magazine female super-middleweight title since July 2023; and the World Boxing Organization (WBO) female middleweight title from 2020 to 2022. As an amateur, she became the first British female world champion after securing gold at the 2012 World Championships. She has been nicknamed as the 'Silent Assassin' due to a combination of her shyness and her multiple knockout wins. As of October 2022, she was ranked the world's second best active female middleweight by BoxRec and by The Ring.
Yamaguchi Falcão Florentino is a Brazilian professional boxer who has held multiple regional titles in the middleweight, super middleweight and cruiserweight divisions. In his amateur years, he won silver at the 2011 Panamerican Games and a bronze at the 2012 Olympics at light heavyweight.
Mike "Twin" Sullivan was an American boxer credited with taking the Welterweight Championship of the World on April 23, 1907, when he soundly defeated William "Honey" Mellody in Los Angeles in a twenty-round bout. He vacated the title in the late fall of 1908, when he could not make weight.
Patrick Alen Teixeira is a Brazilian professional boxer who held the WBO light middleweight title from 2019 to February 2021.
Franchón Crews-Dezurn is an American professional boxer. She is the current World Boxing Council (WBC) Super middleweight world champion and World Boxing Association (WBA) interm world champion defeating Shadasia Green December 15, 2023. She was the undisputed world champion at super middleweight, losing to Savannah Marshall on 2 July 2023. She held the World Boxing Council (WBC) titles between 2018 and 2023; the World Boxing Organization (WBO) title between 2019 and 2023; and the World Boxing Association (WBA) and International Boxing Federation (IBF) title between 2022 and 2023. As of May 2022, she is ranked as the world's best active female super middleweight by The Ring and BoxRec.
Marcus Thomas 
Palooka’s Boxing Club, Halifax, Nova Scotia, Canada
Gennady Golovkin 
Burg-Wächter Castello, Düsseldorf, Germany
Deandre Latimore 
Mohamad Abdallah Said Salem
Kuvonchbek Toygonbaev
Joshua Onyango 
Kenny Stubbs
Pierre Moke Kulewa