770 articles
Sergio Martínez (boxer)
Sergio Gabriel Martínez, "Maravilla" (born 1975, Quilmes, Argentina), Argentine southpaw boxer, 51-3-2 (28 KO); WBC super welterweight and Ring/WBC/WBO middleweight champion 2010-2014, beat Pavlik, Williams, and Chávez Jr., lost final fight to Cotto in 2014.
Serik Sapiyev
Serik Sapiyev (Серік Сәпиев, born 1983) is a Kazakh boxer, 2012 London Olympic welterweight champion and Val Barker Trophy winner, two-time world champion, later a Kazakh sports official and Asian Games 2026 preparation coordinator.
Shadasia Green
Shadasia Green, "The Sweet Terminator", American super middleweight boxer from Paterson, New Jersey; former WBO and IBF champion, MVP signee, 16-2 (11 KOs) after 2026 TKO loss to Lani Daniels.
Shakhob Zoirov
Shakhob Zoirov (Шахобиддин Зоиров), born 1993 in Kagan, Uzbekistan, is a southpaw boxer, 2016 Olympic flyweight gold medalist and 2019 world champion, later an IBA pro bantamweight title challenger.
Shakur Stevenson
Shakur Stevenson, American southpaw boxer born 1997 in Newark, NJ; 2016 Olympic silver medalist; undefeated 25-0 (11 KOs); four-division world champion; quickest ever to four-division titles after beating Teofimo Lopez, January 2026.
Shamil Sabirov
Shamil Sabirov (Шамиль Алтаевич Сабиров), Soviet light-flyweight boxer born 1959 in Karpinsk; won 48 kg gold at the 1980 Moscow Olympics, the only Soviet boxing gold there, beating Hipólito Ramos 3-2.
Shane Mosley
Shane "Sugar" Mosley (Shane Donte Mosley, born 1971), American boxer, three-division world champion (IBF lightweight, WBC/WBA welterweight, light middleweight), twice beat Oscar De La Hoya, IBHOF 2022.
Shane Mosley Jr.
Shane Mosley Jr. (born 1990, Pomona, California), son of 'Sugar' Shane Mosley, is an American middleweight boxer, 23-5 with 13 KOs, trained by Bones Adams and promoted by Zuffa.
Shannon Briggs
Shannon "The Cannon" Briggs (born 1971), American heavyweight boxer from Brownsville, Brooklyn; lineal champion after beating George Foreman 1997, WBO champion 2006-07, lost title fights to Lennox Lewis and Vitali Klitschko, retired 60-6-1 (54 KO) in 2016.
Shawn Porter
Shawn "Showtime" Porter (Shawn Christian Porter, born 1987) is an American former boxer, two-time welterweight world champion (IBF 2013, WBC 2018), retired 2021 at 31-4-1 (17 KOs), now a commentator.
Sin Jun Seop
Sin Jun Seop (신준섭, Shin Joon-Sup), born 1963, South Korean amateur boxer; won 1984 Los Angeles Olympic middleweight gold, beating Virgil Hill 3-2, first Korean Olympic boxing gold; 1986 Asian Games champion; never turned pro.
Siyakholwa Kuse
Siyakholwa 'One Way' Kuse (born 2003) is a South African minimumweight boxer, WBC strawweight world champion since May 2026 after beating Melvin Jerusalem; record 10-3-1 (4 KOs).
Slobodan Kacar
Slobodan Kacar (Слободан Качар), born 1957 in Jajce, is a Serbian boxer who won 1980 Olympic light-heavyweight gold for Yugoslavia and the IBF light-heavyweight pro title (1985–1986), brother of 1976 silver medalist Tadija.
Somjit Jongjohor
Somjit Jongjohor (สมจิตร จงจอหอ), Thai flyweight boxer born 1975; 2008 Beijing Olympic gold medalist, 2003 world champion, 2007 world silver, Asian Games 2002 gold and 2006 silver; retired after 2008 to coach.
Somluck Kamsing
Somluck Kamsing (สมรักษ์ คำสิงห์), also Somrak Khamsing, Thai boxer born 1973 in Khon Kaen; won featherweight gold at Atlanta 1996 as Thailand's first Olympic champion, later actor, convicted in 2025.
Sonny Liston
Sonny Liston (Charles Liston, 1932?–1970), American heavyweight boxing champion 1962–1964; beat Floyd Patterson by first-round knockout twice, lost twice to Muhammad Ali, learned boxing in prison, died mysteriously in Las Vegas.
Sonny Liston vs. Cassius Clay
Sonny Liston vs. Cassius Clay refers to two world heavyweight title fights, in 1964 and 1965, both won in upsets by Cassius Clay, the later Muhammad Ali.
Southpaw stance
Southpaw stance: right hand and foot forward, left rear power hand, mirror of orthodox. Also the disputed baseball-vs-boxing etymology, prevalence (25% elite boxers, 17.4% MMA), contested advantage, and Hagler, Whitaker, Pacquiao.
Srisaket Sor Rungvisai (ศรีสะเกษ ศ.รุ่งวิสัย)
Srisaket Sor Rungvisai (ศรีสะเกษ ศ.รุ่งวิสัย), born Wisaksil Wangek in 1986, is a Thai boxer, two-time WBC super flyweight champion famous for his 2017 majority-decision and fourth-round knockout wins over unbeaten Román González.
Stanislav Stepashkin
Stanislav Stepashkin (Станислав Иванович Степашкин), Soviet amateur boxer, 1964 Tokyo Olympic featherweight gold medalist, twice European champion (1963, 1965), record 193 wins in 204 bouts, later a national-team coach.
Sten Suvio
Sten Suvio (Schuschin, "Stepa"), 1911–1988, Finnish welterweight boxer; first Finnish Olympic boxing champion, winning 66.6 kg gold at Berlin 1936 by unanimous decision over Germany's Michael Murach; later professional 1936–1949 and national coach.
Stephanie Han
Stephanie Han, "The Enforcer" (born 1990), is an undefeated American boxer from El Paso, Texas, WBA female lightweight champion since February 2025, a former El Paso police officer who twice beat Holly Holm in 2026.
Stephen Fulton (boxer)
Stephen Fulton Jr., "Cool Boy Steph" (born 1994, Philadelphia), American boxer, former WBO/WBC super bantamweight and WBC featherweight champion, 23-2 (8 KOs), stopped by Naoya Inoue in 2023.
Steve Collins
Steve Collins, "The Celtic Warrior", Dublin-born Irish boxer, two-weight WBO world champion at middleweight (1994) and super-middleweight (1995-1997), best known for beating Chris Eubank and Nigel Benn twice each before retiring as unbeaten champion in 1997.
Steve Cunningham
Steve Cunningham, born Steven Ormain Cunningham, is an American former boxer from Philadelphia, a two-time IBF cruiserweight champion who knocked down Tyson Fury in their 2013 heavyweight fight.
Steve Zouski
Steve Zouski (born 1954) is an American former heavyweight boxer, active 1978-1991, record 31-18 with 15 KOs; a durable 1980s gatekeeper who fought Mike Tyson, George Foreman, and Marvis Frazier without ever challenging for a title.
Subriel Matías
Subriel Matías, "El Orgullo de Maternillo", Puerto Rican light welterweight boxer from Fajardo; two-time world champion (IBF 2023–24, WBC 2025–26), 23-3 with 22 knockouts, pressure style, stopped by Dalton Smith in 2026.
Sugar Ray Leonard
Sugar Ray Leonard (Ray Charles Leonard, born 1956), American boxer, 1976 Olympic light-welterweight gold medalist and five-division professional world champion; beat Benítez, Durán, Hearns, and Hagler; retired 36-3-1.
Sugar Ray Robinson
Sugar Ray Robinson (Walker Smith Jr., 1921–1989), American boxer, welterweight champion 1946–1951 and five-time middleweight champion; 175-19-6, 110 KOs; widely ranked greatest pound-for-pound fighter in history.
Sugar Ray Robinson vs. Jake LaMotta
Robinson vs. LaMotta: six-fight boxing rivalry, 1942-1951, between Sugar Ray Robinson and Jake LaMotta; Robinson won five, LaMotta one; the sixth, the St. Valentine's Day Massacre, gave Robinson the middleweight title.