JD
Lightweight · United States
Juan Díaz 42-6-0 21 KO · 2000–2017
Juan Díaz was a lightweight boxer from United States, born Sep 17, 1983. Record 42-6-0 with 21 knockouts over 2000–2017. World titles: IBF lightweight (2007–2008), WBO lightweight (2007–2008), WBA lightweight (2004–2007). Juan Díaz last fought Juan Alejandro Guajardo on Sep 30, 2017 and lost by TKO in round 1 of 4.
Also: Хуан Диас · Хуан Діаз · خوان دياز +7 more ファン・ディアス · Baby Bull · Juan Diaz · Vasquez · Диас Х. · Диас Хуан · Диас, Хуан
Born Sep 17, 1983
Country 🇺🇸 United States, 🇲🇽 Mexico
Stance Orthodox
Height 168 cm
Reach 170 cm
Nickname Baby Bull
Debut Jun 23, 2000
Career 2000–2017
Rounds boxed 347
KO share 50%
Born in Houston, Texas, U.S.
Titles IBF, WBA, WBO lightweight · 2004–2008
Boxerbook rating 1934 ± 173 · inactive since Sep 2017Why here › Confirmed bouts 23 of 48 · 19 official
Career record Record
42-6-0, 21 KOs · 2000–2017
Last result L
Juan Alejandro Guajardo
TKO 1/4 · Ayers Event Center, Corpus Christi, 🇺🇸
The record 48 bouts, 2000–2017, newest first. Records under each bout are both boxers going in.
Bouts by source: English Wikipedia · 46, WBA Fights Master Scores · 10, Nevada State Athletic Commission — Results · 6, Texas Department of Licensing and Regulation — Combative Sports Results · 5, Wikipedia (ja) · 3, Wikipedia (ru) · 2
L
Juan Alejandro Guajardo
TKO 1/4 · Ayers Event Center, Corpus Christi, 🇺🇸
Díaz 42-5-0 · Guajardo —
L
Juan Reyna
DEC 4 · Rmb Fair Grounds, Robstown, 🇺🇸
Díaz 42-4-0 · Reyna —
W
Cesar Vasquez
TKO 8/10 · Casino Del Sol, Tucson, Arizona, 🇺🇸
Díaz 41-4-0 · Vasquez —
W
Fernando Garcia
TKO 9/10 · Arena Theatre, Houston, 🇺🇸
Díaz 40-4-0 · Garcia —
W
Carlos Cardenas
UD 10/10 · Energy Arena, Laredo, 🇺🇸
Díaz 39-4-0 · Cardenas —
W
Gerardo Robles
UD 10/10 · Alamodome, San Antonio, 🇺🇸
Díaz 38-4-0 · Robles —
W
UD 10/10 · 1stBank Center, Denver, Colorado, 🇺🇸
Díaz 37-4-0 · Santiago —
W
TKO 5/10 · Energy Arena, Laredo, 🇺🇸
Díaz 36-4-0 · Jesus —
W
Gerardo Cuevas
TKO 6/10 · American Bank Center, Corpus Christi, 🇺🇸
Díaz 35-4-0 · Cuevas —
L
For WBA, WBO, and The Ring lightweight titles UD 12/12 · MANDALAY BAY EVENTS CENTER, LAS VEGAS, 🇺🇸
Díaz 35-3-0 · Méndez 50-5-1
L
Lost WBO–NABO junior welterweight title UD 12/12 · UIC Pavilion Chicago, Illinois, 🇺🇸
Díaz 35-2-0 · Malignaggi 26-3-0
W
Won vacant WBO–NABO junior welterweight title UD 12/12 · Toyota Center, Houston, 🇺🇸
Díaz 34-2-0 · Malignaggi 26-2-0
L
Lost IBO lightweight title TKO 9/12 · Toyota Center, Houston, 🇺🇸
Díaz 34-1-0 · Méndez 49-4-1
W
Won vacant IBO lightweight title SD 12/12 · Toyota Center, Houston, 🇺🇸
Díaz 33-1-0 · Katsidis 23-1-0
L
Lost WBA, IBF, and WBO lightweight titles SD 12/12 · Plaza de Toros, 🇲🇽
Díaz 33-0-0 · Campbell 31-6-1
W
Won IBF lightweight title TKO 9/12 · Sears Centre, 🇺🇸
Díaz 32-0-0 · Díaz 34-3-0
W
Retained WBA lightweight title TKO 8/12 · Foxwoods Resort Casino, 🇺🇸
Díaz 31-0-0 · Popó 38-1-0
W
Fernando Angulo
Retained WBA lightweight title UD 12/12 · Chase Field, 🇺🇸
Díaz 30-0-0 · Angulo —
W
Randy Suico
Retained WBA lightweight title TKO 9/12 · MGM GRAND GARDEN ARENA, LAS VEGAS, 🇺🇸
Díaz 29-0-0 · Suico —
W
Retained WBA lightweight title UD 12/12 · THOMAS & MACK CENTER, LAS VEGAS, 🇺🇸
Díaz 28-0-0 · Cotto —
Show all 48 bouts W
Arthur Cruz
TKO 5/10 · Coushatta Casino Resort, Kinder, Louisiana, 🇺🇸
Díaz 27-0-0 · Cruz —
W
For WBA lightweight title TKO 9/12 · Reliant Center, Houston, 🇺🇸
Díaz 26-0-0 · Irwin 42-5-0
W
Retained WBA lightweight title UD 12/12 · AT&T Center, 🇺🇸
Díaz 25-0-0 · Lorcy 56-3-2
W
Won WBA lightweight title UD 12/12 · Reliant Center, 🇺🇸
Díaz 24-0-0 · Sim 19-3-1
W
Martin O'Malley
TKO 2/10 · Pechanga Resort & Casino, Temecula, 🇺🇸
Díaz 23-0-0 · O'Malley —
W
Joel Perez
Retained WBC Youth lightweight title TKO 6/10 · Reliant Center, Houston, 🇺🇸
Díaz 22-0-0 · Perez —
W
Retained WBC Youth lightweight title UD 10/10 · Reliant Center, Houston, 🇺🇸
Díaz 21-0-0 · Lorenzo 18-2-0
W
Eleazar Contreras Jr.
Won vacant WBC Youth lightweight title UD 10/10 · Pechanga Resort & Casino, Temecula, California, 🇺🇸
Díaz 20-0-0 · Contreras Jr. —
W
John Bailey
TKO 7/10 · Mohegan Sun Arena, Montville, 🇺🇸
Díaz 19-0-0 · Bailey —
W
Arthur Cruz
TKO 4/10 · Bally's Park Place, Atlantic City, 🇺🇸
Díaz 18-0-0 · Cruz —
W
Roy Delgado
TKO 6/10 · Reliant Center, Houston, 🇺🇸
Díaz 17-0-0 · Delgado —
W
Peter Nieves
UD 10/10 · Bally's Park Place, Atlantic City, New Jersey, 🇺🇸
Díaz 16-0-0 · Nieves —
W
Michael Davis
UD 10/10 · Entertainment Center, Laredo, Texas, 🇺🇸
Díaz 15-0-0 · Davis —
W
Nelson Ramon Medina
UD 8/8 · Mohegan Sun Arena, Montville, 🇺🇸
Díaz 14-0-0 · Medina —
W
Juan Carlos Juarez
UD 8/8 · Radisson Hotel, Houston, 🇺🇸
Díaz 13-0-0 · Juarez —
W
Rudolfo Lunsford
UD 4/4 · Reliant Center, Houston, 🇺🇸
Díaz 12-0-0 · Lunsford —
W
Ubaldo Hernandez
SD 8/8 · Don Haskins Center, El Paso, Texas, 🇺🇸
Díaz 11-0-0 · Hernandez —
W
Scott Buck
TKO 1/6 · Soaring Eagle Casino & Resort, Mount Pleasant, Michigan, 🇺🇸
Díaz 10-0-0 · Buck —
W
John Trigg
UD 6/6 · Mohegan Sun Arena, Montville, 🇺🇸
Díaz 9-0-0 · Trigg —
W
Carlos Horacio Nevarez
KO 1/6 · Mohegan Sun Arena, Montville, 🇺🇸
Díaz 8-0-0 · Nevarez —
W
Mahan Washington
UD 6/6 · TEXAS STATION HOTEL & CASINO, LAS VEGAS, 🇺🇸
Díaz 7-0-0 · Washington —
W
Bradley Jensen
UD 6/6 · Mohegan Sun Arena, Montville, Connecticut, 🇺🇸
Díaz 6-0-0 · Jensen —
W
Michael Lucero
UD 6/6 · MGM CONFERENCE CENTER, LAS VEGAS, 🇺🇸
Díaz 5-0-0 · Lucero —
W
Antonio Young
TKO 2/6 · Mandalay Bay Resort, Las Vegas, 🇺🇸
Díaz 4-0-0 · Young —
W
Starr Johnson
TKO 3/4 · International Ballroom, Houston, Texas, 🇺🇸
Díaz 3-0-0 · Johnson —
W
Juan Carlos Alvarez
TKO 1/4 · Salón Teotihuacán, Mexicali, 🇲🇽
Díaz 2-0-0 · Alvarez —
W
Miller Vazquez
KO 1/4 · Arena México, Mexico City, 🇲🇽
Díaz 1-0-0 · Vazquez —
W
Rafael Ortiz
TKO 1/4 · Poliforum Zamna, Mérida, 🇲🇽
Díaz 0-0-0 · Ortiz —
Ratings now Not in any current ranking.
World titles
Facts
What is Juan Díaz's record? Juan Díaz's professional record is 42-6-0 with 21 knockouts.
Who did Juan Díaz fight last? Juan Díaz last fought Juan Alejandro Guajardo on Sep 30, 2017 and lost by TKO in round 1 of 4.
Which world titles has Juan Díaz held? Juan Díaz has held 3 world title reigns: IBF lightweight (2007–2008), WBO lightweight (2007–2008), WBA lightweight (2004–2007). Sources Boxerbook ID 4628 · permanent link boxerbook.com/id/4628 . Wikidata (CC0), English Wikipedia (CC BY-SA). Last fetched: 2026-10-12. Spot a mistake? Every bout page has a link to report it.