Jermain Taylor is an American former professional boxer who competed from 2001 to 2014. He remains the most recent undisputed middleweight champion, having won the WBA (Undisputed), WBC, IBF, WBO, and The Ring middleweight titles in 2005 by beating Bernard Hopkins, and in doing so ending Hopkins' ten-year reign as middleweight champion. This made Taylor the first, and to date, only male boxer in history to claim each title from all four major boxing sanctioning organizations in a single fight. He once again defeated Hopkins six months later, making him the only fighter to have defeated Hopkins twice. He retired as a world champion in the months that followed his capture of the IBF middleweight title for a second time, after making a substantial recovery from a brain injury sustained earlier in his career.
Sam Soliman is an Australian professional boxer, and former kickboxer and mixed martial artist. In boxing, he held the International Boxing Federation (IBF) middleweight title in 2014, becoming the oldest middleweight world champion in history at the time.
Adnan Ćatić, known as Felix Sturm, is a Bosnian-German professional boxer. He has held multiple world championships in two weight classes, at middleweight and super-middleweight. As an amateur, he won a gold medal at the 2000 European Championships in the light-middleweight division.
Maselino Francis Masoe Fao is a retired Samoan boxer who represented American Samoa at three Olympics starting with the 1988 Summer Olympics. As a professional, Masoe made history becoming the first Samoan boxer to win a major world title, defeating Kenyan born Evans Ashira on May 1, 2004 for the regular WBA world middleweight crown via second round Technical Knockout. He is the brother of rugby player Chris Masoe. Another brother, Mika, also represented American Samoa in boxing at the 1988 and 1992 Olympics.
Daniel Geale is an Australian former professional boxer who competed from 2004 to 2016. He held the unified WBA (Super) and IBF middleweight titles between 2011 and 2013, and the IBO middleweight title from 2007 to 2009. As an amateur boxer, Geale won a welterweight gold medal at the 2002 Commonwealth Games.
Jack Robert Culcay-Keth is an Ecuadorian-born German professional boxer. As an amateur he represented Germany, fighting at the 2008 Summer Olympics in the welterweight division, and winning a silver medal at the 2008 European Championships and gold at the 2009 World Championships. He held the WBA interim light-middleweight title between 2015 and 2017.
Daniel "The Rock" Dawson is an Australian super welterweight kickboxer and boxer, fighting out of Perth, Western Australia.
In boxing, a weight class is a measurement weight range for boxers. The lower limit of a weight class is equal to the upper weight limit of the class below it. The top class, with no upper limit, is called heavyweight in professional boxing and super heavyweight in amateur boxing. A boxing match is usually scheduled for a fixed weight class, and each boxer's weight must not exceed the upper limit. Although professional boxers may fight above their weight class, an amateur boxer's weight must not fall below the lower limit. A nonstandard weight limit is called a catchweight.
Ryōta Murata is a Japanese former professional boxer who competed from 2013 to 2022. He held the WBA (Regular) middleweight title twice between 2017 and 2021, and the WBA (Super) middleweight title from 2021 to 2022. As an amateur, he won a silver medal at the 2011 World Championships, and gold the following year at the 2012 Olympics.
Terrell Maurice Gausha is an American professional boxer who challenged for the WBA and IBO light middleweight titles in 2017. As an amateur he represented the United States at the 2012 Summer Olympics in the middleweight division.
Claressa Maria Shields is an American professional boxer and professional mixed martial artist. She has held multiple world championships in three weight classes, including the undisputed female light middleweight title since March 2021; the undisputed female middleweight title from 2019 to 2020; and the unified WBC and IBF female super middleweight titles from 2017 to 2018. Shields currently holds the record for becoming a two and three division world champion in the fewest professional fights. As of October 2022, she is ranked the world's best active female middleweight by BoxRec, as well as the best active female boxer, pound for pound, by ESPN and The Ring.
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 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.
The boxing tournaments at the 2016 Summer Olympics in Rio de Janeiro took place from 6 to 21 August 2016 at the Pavilion 6 of Riocentro. However, boxing at the games was overshadowed with controversy after there were doubts raised that results in certain bouts had been manipulated. These concerns were upheld in a report published in 2021.
Callum John Smith is an English professional boxer. He held the World Boxing Association (WBA) and Ring magazine super-middleweight titles from 2018 to 2020. At regional level, he held the British and European super-middleweight titles between 2015 and 2017. In 2018 he won the World Boxing Super Series super-middleweight tournament, winning the Muhammad Ali trophy in the process. He is the youngest of the Smith brothers—Paul, Stephen, and Liam—all of whom are professional boxers.
Blake Caparello is an Australian Light Heavyweight Professional Boxer. Challenged formidable Sergey Kovalev for his first World Title in 2014.
Joe Cordina is a Welsh-Maltese professional boxer. He is a two-time super-featherweight world champion, having held the International Boxing Federation (IBF) title from April 2023 until May 2024 and previously in 2022. At regional level, he held the British and Commonwealth lightweight titles between 2018 and 2019. As an amateur, he won a bronze medal at the 2014 Commonwealth Games and gold at the 2015 European Championships, both in the lightweight division. He also represented Great Britain at the 2016 Summer Olympics.
Fedor Chudinov is a Russian professional boxer. He held the WBA (Super) super-middleweight title in 2016, having previously held the regular title from 2015 to 2016 and the interim title from 2014 to 2015. He is the brother of fellow boxer Dmitry Chudinov.
John Ryder is a British former professional boxer who competed from 2010 to 2024. He held an interim super-middleweight world title twice, and challenged twice for full world titles in that weight class, including the undisputed championship. At regional level, he challenged twice for the British middleweight title and once for the British super-middleweight title.
Eumir Felix de los Santos Marcial is a Filipino boxer. While representing the Philippines as an amateur, he won a silver medal at the 2019 World Championships and bronze at the 2020 Summer Olympics, both in the middleweight division.
Israil Madrimov is a professional boxer from Uzbekistan, who has held WBA super welterweight title since March 2024. As an amateur, he won a silver medal in the welterweight division at the 2014 Asian Games and gold in the middleweight division at the 2018 edition.
Zac Awad
Togasilimai Letoa 
Joseph Kwadjo
Eduardo Rojas
Felix Sturm 
Andreas Seran
Tshepo Mashego 
Nonoy Gonzales
Komgrit Nanakorn
Paz Viejo