770 articles
Oliver Kirk
Oliver Kirk (Oliver Leonard Kirk, 1884-1960), American boxer, only Olympic boxer to win two golds in separate weight classes at one Games, taking bantamweight and featherweight titles at the 1904 St. Louis Olympics; later a professional with a 4-8-1 record.
Oliver McCall
Oliver McCall, "The Atomic Bull" (born 1965, Chicago), American heavyweight boxer; WBC champion who upset Lennox Lewis by TKO2 in 1994, lost to Bruno, broke down in the 1997 rematch, and fought into his sixties.
Orlando Salido
Orlando Salido (Siri), Mexican boxer born 1980 in Ciudad Obregon, Sonora; multiple world featherweight and super featherweight champion (IBF, WBO), famous for beating Vasyl Lomachenko in 2014; retired 2017 at 44-14-4.
Orthodox stance
The orthodox stance is the standard fighting position in boxing, with the left foot and hand leading so the dominant right hand throws power punches; about 90% of boxers use it.
Oscar Bonavena
Oscar "Ringo" Bonavena (1942–1976), Argentine heavyweight boxer, twice fought Joe Frazier and lost by 15th-round TKO to Muhammad Ali in 1970; murdered at the Mustang Ranch brothel near Reno, Nevada.
Oscar Casanovas
Oscar Casanovas (Óscar Casanovas, 1914–1987) was an Argentine featherweight boxer who won gold at the 1936 Berlin Olympics, beating Charlie Catterall in the final, then acted in film and trained champions.
Oscar De La Hoya
Oscar De La Hoya, "the Golden Boy" (born 1973), American boxer and promoter; 1992 Olympic lightweight gold medalist, 10 world titles in six weight classes, founder of Golden Boy Promotions in 2002.
Óscar Valdez
Óscar Valdez (Óscar Rafael Valdez Fierro, born 1990), Mexican boxer, two-time Olympian and two-division world champion: WBO featherweight 2016-2019, WBC super featherweight 2021-2022; record 33-3-0, 24 KOs.
Otto von Porat
Otto von Porat was a Norwegian heavyweight boxer who won gold at the 1924 Paris Olympics, Norway's first and only Olympic boxing champion, before turning professional in 1926.
Otto Wallin
Otto Wallin (Einar Otto Wallin, born 1990), Swedish southpaw heavyweight boxer from Sundsvall, nicknamed All In. Record 28-4, 1 NC (16 KOs); pushed Tyson Fury 12 rounds in 2019, lost to Anthony Joshua in 2023 and Derek Chisora in 2025.
Pascual Perez
Pascual Perez (Pascual Nicolás Pérez Alonso, El León Mendocino), Argentine flyweight boxer; 1948 Olympic gold medalist and first Argentine world boxing champion, holding the flyweight title 1954–1960.
Patrick Brown (boxer)
Patrick James Brown (born 1999), English cruiserweight boxer from Sale, Manchester; 2024 Team GB Olympian, two-time national amateur champion; unbeaten 7-0 pro with 7 knockouts, WBA International cruiserweight titleholder with Matchroom Boxing.
Patrizio Oliva
Patrizio Oliva, Italian boxer born 1959 in Naples, nicknamed Sparviero; 1980 Moscow Olympic light-welterweight gold and Val Barker Trophy winner, later WBA super lightweight world champion 1986-1987, pro record 57-2 (20 KOs).
Paul Fritsch
Paul Fritsch (Paul François Nicolas Fritsch, 1901–1970), French featherweight boxer; first French Olympic boxing champion, winning gold at Antwerp 1920 by beating Jean Gachet in the final; professional from 1921 to 1929.
Paul Gonzales, Jr.
Paul Gonzales, Jr. (Paul Garza Gonzales, Jr.), American boxer born 1964 in East Los Angeles; won 1984 Olympic light-flyweight gold and the Val Barker Trophy, boxed professionally 1985-1991, and was sentenced in 2021 for lewd conduct with minors.
Paul Sykes (boxer)
Paul Sykes (23 May 1946 – 7 March 2007) was a British heavyweight boxer from Wakefield who fought John L Gardner for the British and Commonwealth titles in 1979, held a 500-lb weightlifting record, wrote the Koestler-winning memoir Sweet Agony, and spent 21 of 26 years in prison.
Paulie Malignaggi
Paulie Malignaggi, "Magic Man", American boxer from Brooklyn; IBF junior welterweight champion 2007-2008 and WBA welterweight champion 2012-2013; later bare-knuckle fighter and boxing commentator.
Pernell Whitaker
Pernell "Sweet Pea" Whitaker (1964-2019), American boxer, 1984 Olympic gold medalist and four-division world champion; undisputed lightweight champion 1990; famous Chavez draw; 40-4-1 (17 KOs).
Petar Lesov
Petar Lesov (Петър Лесов), born 1960 in Rakovski, Bulgaria, is a flyweight boxer who won 51 kg gold at the 1980 Moscow Olympics, becoming Bulgaria's youngest Olympic champion, later a two-time European champion and national coach.
Pete Rademacher
Pete Rademacher (Thomas Peter Rademacher, 1928-2020), American heavyweight boxer, 1956 Olympic gold medalist, and the only man to fight for the world heavyweight title in his professional debut, losing to Floyd Patterson by sixth-round KO in 1957.
Peter Kadiru
Peter Kadiru (born 1997, Hamburg) is a German heavyweight boxer, 2014 Youth Olympic gold medalist, three-time European amateur champion, 23-2 pro, lost a 2026 WBA title fight to Murat Gassiev.
Peter McNeeley
Peter McNeeley, "The Hurricane," American heavyweight boxer from Medfield, Massachusetts, 47-7 pro record. Best known as Mike Tyson's first post-prison opponent, stopped in 89 seconds on August 19, 1995.
Peter Quillin
Peter "Kid Chocolate" Quillin (born 1983, Chicago) is a retired American boxer, WBO middleweight champion 2012-2014 with three defenses, ending 34-2-1, 1 NC (23 KOs).
Piero Toscani
Piero Toscani (Pietro Toscani, 1904-1940), Italian middleweight boxer and 1928 Amsterdam Olympic gold medalist, one of the 'Three Musketeers of Amsterdam' with Tamagnini and Orlandi; controversial points final win over Jan Heřmánek; short pro career.
Prichard Colón
Prichard Colón (1992–2026), Puerto Rican welterweight, undefeated prospect left in a vegetative state by illegal rabbit punches from Terrel Williams on October 17, 2015; 221-day coma, WBC honorary champion, namesake of the Prichard Colón Rule; died August 13, 2026, aged 33.
Primo Carnera
Primo Carnera (1906–1967), Italian heavyweight boxing champion 1933–34 after knocking out Jack Sharkey; at about 260 lb and 197 cm the heaviest champion of his era, later a wrestler and actor, his legacy contested over fixed fights.
Professional boxing
Professional boxing: paid prizefighting under state commissions, scored by three judges on the 10-point must system, with four rival sanctioning bodies (WBC, WBA, IBF, WBO) issuing separate titles and rankings, regulated in the US by the 1996 PBSA and 2000 Ali Act.
Rafael Espinoza
Rafael "El Divino" Espinoza, undefeated Mexican WBO featherweight champion (28-0, 24 KOs), 6 ft 1 in, who upset Robeisy Ramirez in December 2023 and defended the title four times, including a rematch TKO.
Rafael Iglesias
Rafael Iglesias (Argentino Rafael Iglesias, 1924–1999), Argentine heavyweight boxer, won the 1948 London Olympic heavyweight gold by knocking out Sweden's Gunnar Nilsson; Argentina's last Olympic boxing champion.
Rakhim Chakhkiyev
Rakhim Chakhkiyev is a retired Russian boxer, born in 1983 in Tobolsk, who won Olympic heavyweight gold at Beijing 2008 and later held several cruiserweight professional titles.