- The Corros:
- --- Hugo , world Middleweight champion
- --- Osvaldo , 1980s contender, Hugo's brother
- The Cruzs
- --- Carlos , world Lightweight champion
- --- Leo , world Featherweight champion, Carlos' brother
- The Tiozzos
- --- Fabrice , world Super-Middleweight champion
- --- Christophe , world Cruiserweight champion, Fabrice's brother
- The Steccas
- --- Loris , world Jr. Featherweight champion
- --- Mauricio , 1980s contender, Loris' brother
- The Barreras
- --- Jorge , 1990s contender
- --- Marco Antonio , 3 division world champion, Jorge's brother
- The Chavezs
- --- Julio Cesar , 3 division world champion
- --- Julio Cesar Jr. , boxing prospect
- --- Roberto , 1990s contender, Julio Sr.'s brother
- The Marquezs
- --- Juan Manuel former featherweight world champion
- --- Rafael world bantamweight champion, Juan Manuel's brother
- The Romans
- --- Gilberto , world Bantamweight champion
- --- Jorge , 1990s contender, Gilberto's brother
- The Ruelas
- --- Gabriel , world Jr. Lightweight champion
- --- Rafael , world Lightweight champion, Gabriel's brother
- The Durans
- --- Irichelle , Women's Boxing contender
- --- Roberto , 4 division world champion, Irichelle's father
- The Pedrozas
- --- Eusebio , world Featherweight champion
- --- Rafael , world Jr. Bantamweight champion, Eusebio's cousin
- The Benitezs (brothers)
- --- Frankie , 1970s contender
- --- Gregory , 1970s contender
- --- Wilfred , 3 division world champion
- The Camachos
- --- Felix , former world title challenger
- --- Hector , 3 division world champion, Felix's brother
- --- Hector Jr. , contender
- The Cottos
- --- Miguel ,WBO light welterweight champion
- --- Jose , lightweight challenger, brother to Miguel
- The De Leons
- --- Carlos , 4 time world Cruiserweight champion
- --- Carlos Jr. , prostect
- The Solis (brothers)
- --- Enrique , former world title challenger
- --- Julian , world Bantamweight champion
- --- Rafael , former world title challenger
- The Trinidads
- --- Felix Jr. , 3 division world champion
- --- Felix Sr. , Puerto Rican regional Featherweight champion
- The Galaxys
- --- Khaosai , 2 division world champion
- --- Kaokor , Khaoshai's twin brother, world champion
- The Noels
- --- Claude , world Lightweight champion
- --- David , 1980s contender, Claude's brother
- The Klitschkos (brothers)
- --- Vitali , world Heavyweight champion
- --- Wladimir , world Heavyweight champion
- The Alis
- --- Laila , women's world Middleweight champion
- --- Muhammad , Laila's father, ''the greatest'', 3 time world Heavyweight champion
- The Ayalas
- --- Mike , former world title challenger
- --- Tony , controversial Jr. Middleweight contender, Mike's brother
- The Baers
- --- Buddy , former world title challenger
- --- Max , world Heavyweight champion, Buddy's brother; Jethro's real-life pa
- The Baltazars
- --- Frankie , 1970s Featherweight contender
- --- Tony , former world Jr. Welterweight title challenger, Frankie's brother
- The Canizales
- --- Gaby , world Bantamweight champion
- --- Orlando , world Bantamweight champion, Gaby's brother
- The Currys
- --- Bruce , world Jr. Welterweight champion
- --- Donald , world Welterweight champion, Bruce's brother
- The Foremans
- --- Freeda , women's boxing contender
- --- George , former 2 time world Heavyweight champion, Freeda's father
- The Fraziers
- --- Jackie , women's boxing contender
- --- Joe , family patriarch, world Heavyweight champion
- --- Marvis , former world title challenger
- --- Tyrone , 1980s contender
- The Fullmers
- --- Don 1960s contender
- --- Gene world Middleweight champion
- The Gattis
- --- Arturo , world Jr. Lightweight champion
- --- Joe , former world title challenger, Arturo's brother
- The Hagler-Sims family
- --- Marvin Hagler , world Middleweight champion
- --- Robbie Sims , former world title challenger, Marvin Hagler's half-brother
- The Hopkins family
- --- Bernard Hopkins former undisputed middleweight champion of the world
- --- Demetrius Hopkins Light welterweight challenger, nephew to Bernard
- The Judahs
- --- Daniel , light-heavyweight contender, Zab's older brother
- --- Josiah , super-middleweight boxer, Zab's younger brother
- --- Yoel , family patriarch, boxer, trainer, and Kickboxing champion
- --- Zab , former undisputed welterweight champion, Yoel's son
- The Leonards
- --- Roger , 1970s contender
- --- Ray , 5 division world champion, Roger's nephew
- The Lopezs
- --- Danny , world Featherweight champion
- --- Ernie , former world title challenger, Danny's brother
- The Mancinis
- --- Lenny , 1940s contender
- --- Ray , world Lightweight champion, Lenny's son
- The Mayweathers
- --- Floyd Jr. , 4 division world champion
- --- Floyd Sr. , 1970s – 1980s contender
- --- Jeff , 1990s contender, Floyd Sr.'s brother
- --- Roger , 2 division world champion, Floyd Sr.'s brother, Floyd Jr.'s Trainer
- The McCrorys
- --- Milton , world Welterweight champion
- --- Steve , former world title challenger
- The McNeeleys
- --- Peter , Heavyweight. "fought" Mike Tyson
- --- Tom Jr. , Heavyweight challenger, fought against Floyd Patterson , Peter's dad
- --- Tom Sr. , Light heavyweight challenger, Tom Jr's dad, Peter's grandfather
- The Muhammads
- --- Eddie Mustapha , world Light Heavyweight champion
- --- Steve , former world title challenger
- The Norris
- --- Orlin , former world Cruiserweight champion, fought Mike Tyson
- --- Terry , 3 time world Jr. Middleweight champion
- The Pattersons
- --- Floyd , 2 time world Heavyweight champion
- --- Tracy , world Jr. Lightweight champion, Floyd's adoptive son
- The Sandovals
- --- Alberto , former world title challenger
- --- Richie , world Bantamweight champion, Alberto's brother
- The Spinks
- --- Cory , world undisputed Welterweight champion
- --- Leon , world Heavyweight champion, Cory's father
- --- Michael , 2 division world champion, Cory's uncle
- The Webbers
- --- Dora And Cora Webber , world champion women boxers, twin sisters
- The Espanas
- --- Crisanto , world Welterweight champion
- --- Ernesto , world Lightweight champion, Crisanto's brother
|
