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Jack Della Maddalena
Jack Della Maddalena (Giacomo Della Maddalena, born 1996) is an Australian welterweight MMA fighter from Perth who won the UFC welterweight title from Belal Muhammad at UFC 315 in 2025, lost it to Islam Makhachev at UFC 322, and is 18-4-0.
Jack Dempsey
Jack Dempsey (William Harrison Dempsey, 1895–1983), American heavyweight boxing champion 1919–1926, the 'Manassa Mauler'; Toledo 1919 win over Willard, five million-dollar gates, Tunney rivalry, the 1927 Long Count.
Jack Evans (wrestler)
Jack Evans (Jack Edward Miller, born 1982) is an American high-flying professional wrestler of ROH, Dragon Gate, AAA, and AEW fame; four-time AAA World Tag Team Champion and founding member of Generation Next.
Jack Hermansson
Jack Hermansson, "The Joker", Swedish-born UFC welterweight (formerly middleweight) based in Oslo, 24-10-0, 11 KO and 6 submission wins; notable wins over Jacare Souza and Kelvin Gastelum.
Jack Johnson (boxer)
Jack Johnson (John Arthur Johnson, 1878–1946), the Galveston Giant, first African American world heavyweight boxing champion (1908–1915); beat Tommy Burns 1908 and Jeffries in the 1910 Fight of the Century; Mann Act conviction pardoned in 2018.
Jack Niflot
Jack Niflot, full name Isidor Gadar Niflot, was an American wrestler who won the 1904 Olympic freestyle bantamweight gold in St. Louis and later coached at Columbia and Princeton.
Jack Sharkey
Jack Sharkey (Joseph Paul Zukauskas, 1902-1994), Lithuanian-American heavyweight boxer, world champion 1932-33; beat Schmeling, lost to Dempsey, Carnera, and Louis; only man to fight Dempsey and Louis.
Jack Talos
Jack Talos (Zechariah Smith, born 1991), also Talos, Jake Talos, Painful Paul, is a 7 ft American pro wrestler; 2x NWA US Tag Team Champion and AJPW World Tag Team Champion with Ren Ayabe.
Jack Vanbebber
Jack VanBebber, nicknamed Blackjack, was an American freestyle wrestler from Perry, Oklahoma, who won welterweight gold at the 1932 Los Angeles Olympics after three NCAA titles at Oklahoma State.
Jackie Fields
Jackie Fields (Jacob Finkelstein, 1908–1987), American boxer; 1924 Olympic featherweight gold at 16, youngest Olympic boxing champion, and two-time world welterweight champion (1929–30, 1932–33).
Jackie Gayda
Jackie Gayda (Jacquelyn Suzanne Gayda-Haas), American retired wrestler and valet; Tough Enough 2 co-winner (2002), WWE's "Miss Jackie" valet to Rico and Charlie Haas, infamous for the July 2002 Raw mixed tag match called one of wrestling's worst.
Jackson Drake
Jackson Drake (born 2003, Greensboro, NC) is an American professional wrestler, inaugural WWE Evolve Champion (June 2025 to March 2026), leader of The Vanity Project, and NXT North American Champion on WWE NXT.
Jacob Duran
Jacob "Stitch" Duran (born 1951) is an American cutman from Planada, California, known for treating cuts for Wladimir Klitschko, Anderson Silva, and Tyson Fury, his UFC exit over the Reebok deal, and film roles in Rocky Balboa and Creed.
Jacob Fatu
Jacob Fatu, "The Samoan Werewolf," is a WWE wrestler of the Anoa'i family, son of The Tonga Kid. Longest-reigning MLW World Heavyweight Champion (819 days); WWE debut June 21, 2024; former United States and WWE Tag Team Champion.
Jacqueline Moore
Jacqueline Moore (Jacqueline DeLois Moore, born 1966), also Miss Texas and Jacqueline, American professional wrestler from Dallas; first African American WWF Women's Champion, WWE Cruiserweight Champion, 14-time USWA Women's Champion, 2016 WWE Hall of Fame inductee.
Jacques Lataste
Jacques Lataste (Jacques Vital Lucien Lataste), French foil fencer, 1922-2011; Olympic team foil gold 1948 and 1952, silver 1956; world team champion 1951, 1953; later a Paris surgeon.
Jacques Ochs
Jacques Ochs (Jacques Martin Ochs, 1883–1971), Belgian painter, caricaturist for Pourquoi Pas?, and fencer; won 1912 Olympic team épée gold and 1914 world épée title; drew fellow prisoners at Fort Breendonk.
Jacques Rougeau
Jacques Rougeau (Jacques Rougeau Jr., The Mountie), Canadian wrestler born 1960 in Saint-Sulpice, Quebec; WWF Intercontinental Champion 1992 and three-time WWF World Tag Team Champion as one of The Quebecers; later ran a family-friendly Montreal promotion.
Jacy Jayne
Jacy Jayne (Avery Taylor), American WWE wrestler on SmackDown, Women's United States Champion; ex-Toxic Attraction, leads Fatal Influence; 2x NXT Women's Champion and first active NXT star to also hold the TNA Knockouts Championship.
Jade Cargill
Jade Cargill, American WWE wrestler and former AEW TBS Champion (59-0/61-0 streaks), D1 basketball player, 2025 Queen of the Ring, WWE Women's Champion Nov 2025, Atlanta Smoke owner.
Jade Jones (taekwondo)
Jade Jones, Welsh taekwondo fighter born 1993, double Olympic -57kg gold medallist at London 2012 and Rio 2016, first British Olympic taekwondo champion, 2019 world champion, who retired from taekwondo in 2025 to box professionally.
Jai Opetaia
Jai Opetaia, full name Jai Tapu Opetaia, is an unbeaten Australian cruiserweight boxer who won the IBF and Ring world titles from Mairis Briedis in 2022.
Jaida Parker
Jaida Parker, ring name of Tiana Lillian Marie Caffey (born 1999), is an American WWE wrestler and former LSU soccer player. She rose in NXT, feuded with Natalya in 2026, and joined Raw's The 946 in September 2026.
Jailton Almeida
Jailton "Malhadinho" Almeida (Jailton Jesus Almeida Junior) is a Brazilian heavyweight MMA fighter born in 1991 in Salvador, Bahia, who was released by the UFC in February 2026.
Jaime Munguía
Jaime Munguía (Jaime Aaron Munguia Escobedo), Mexican boxer from Tijuana; WBO super-welterweight champion 2018, lost to Canelo Álvarez 2024, cleared in a 2025 doping case, WBA super-middleweight champion 2026.
Jairzinho Rozenstruik
Jairzinho "Bigi Boy" Rozenstruik, born 1988 in Paramaribo, Suriname, is a heavyweight MMA fighter and former kickboxer (76-8-1, 64 KOs), the first Surinamese UFC fighter, known for knockouts of Overeem and Arlovski.
Jakara Jackson
Jakara Jackson, ring name of Jamara Garrett (now Mara Sadè), American wrestler; WWE NXT 2022-2025, Meta-Four and Meta-Girls with Lash Legend, then TNA and independents.
Jake Carter (wrestler)
Jake Carter, real name Jesse Allen White (born 1986), son of Vader, was a WWE developmental wrestler in FCW and NXT, a one-time FCW Florida Tag Team Champion with Corey Graves, released in 2013.
Jake Ellenberger
Jake "The Juggernaut" Ellenberger (born 1985, Omaha, Nebraska) is a retired American UFC welterweight, 31-15 pro, famous for a 53-second KO of Jake Shields; retired 2018 after a TKO loss to Bryan Barberena.
Jake Hager
Jake Hager, formerly WWE's Jack Swagger, is an American pro wrestler and ex-Bellator MMA heavyweight; Oklahoma All-American, World Heavyweight Champion, AEW Inner Circle enforcer, later Power Slap fighter.