Joseph Diaz (33-8-1, 15) was born in South El Monte, California, U.S. on November 23, 1992. At the age of 20 years on December 15, 2012, he made his professional boxing debut against Vicente Afaro Martinez, winning the fight via 4-round unanimous decision.
On his 27th career fight at 25 years old, Joseph Diaz got a shot at the WBC featherweight titles against Gary Russell Jr. on May 19, 2018 but lost the fight via 12-round unanimous decision.
He became a super-featherweight world champion (IBF) on January 30, 2020 at the age of 27 years old, on his 32nd career fight, after defeating Tevin Farmer via 12-round unanimous decision.
Diaz' last fight was a 10-round unanimous decision loss to Regis Prograis at age 32 on August 2, 2025. He is on a 4-fight losing streak.
Some of Joseph Diaz' best fights have been against Javier Fortuna, Tevin Farmer, Rene Alvarado, Luis Maldonado, Shavkat Rakhimov, Freddy Fonseca and Mercito Gesta.
Diaz has 8 losses on his boxing record.
| # | Date | Opponent | Weight | Round | Method | Result |
|---|---|---|---|---|---|---|
42  | Aug 2, 2025 32 years, 8 months 33-8-1 (15) | 36 years, 6 months 29-3 (24) | LT | 10 | UD | LOSS |
41 | Nov 9, 2024 31 years, 11 months 33-7-1 (15) | Abraham Montoya | LT | 10 | SD | LOSS |
40  | Apr 27, 2024 31 years, 5 months 33-6-1 (15) | 28 years, 3 months 26-2-1 (21) | SLT | 9 | KO | LOSS |
39 | Feb 15, 2024 31 years, 2 months 33-5-1 (15) | Jesus Antonio Perez Campos | LT | 10 | SD | LOSS |
38 | Jul 8, 2023 30 years, 7 months 33-4-1 (15) | Jerry Perez | LT | 10 | UD | WIN |
37  | Mar 18, 2023 30 years, 3 months 32-4-1 (15) | 35 years, 5 months 33-3-3 (17) | LT | 10 | SD | LOSS |
36  | Oct 29, 2022 29 years, 11 months 32-3-1 (15) | 26 years, 4 months 26-0 (23) | LT | 12 | UD | LOSS |
35  | Dec 4, 2021 29 years 32-2-1 (15) | 23 years 26-0 (15) | LT | 12 | UD | LOSS For WBC |
34  | Jul 9, 2021 28 years, 7 months 32-1-1 (15) | 31 years, 11 months 36-2-1 (25) | LT | 12 | UD | WIN Won WBC InterimVacant |
33  | Feb 13, 2021 28 years, 2 months 31-1-1 (15) | 26 years, 5 months 15-0 (12) | SFT | 12 | MD | DRAW |
32  | Jan 30, 2020 27 years, 2 months 31-1 (15) | 29 years, 6 months 30-4-1 (6) | SFT | 12 | UD | WIN Won IBF |
31 | Sep 21, 2019 26 years, 9 months 30-1 (15) | Jesus Cuadro | SFT | 12 | MD | WIN |
30 | May 4, 2019 26 years, 5 months 29-1 (15) | Freddy Fonseca | SFT | 7 | TKO | WIN |
29 | Feb 9, 2019 26 years, 2 months 28-1 (14) | Charles Huerta | FT | 10 | UD | WIN |
28 | Aug 11, 2018 25 years, 8 months 27-1 (14) | JesĂșs Rojas | FT | 12 | UD | WIN |
27  | May 19, 2018 25 years, 5 months 26-1 (14) | 29 years, 11 months 28-1 (17) | FT | 12 | UD | LOSS For WBC |
26 | Feb 22, 2018 25 years, 2 months 26-0 (14) | Victor Terrazas | FT | 3 | KO | WIN |
25 | Sep 16, 2017 24 years, 9 months 25-0 (13) | Rafael Rivera | FT | 12 | UD | WIN |
24 | May 6, 2017 24 years, 5 months 24-0 (13) | Manuel Ăvila | FT | 10 | UD | WIN |
23 | Dec 17, 2016 24 years 23-0 (13) | Horacio GarcĂa | FT | 10 | UD | WIN |
22 | Sep 17, 2016 23 years, 9 months 22-0 (13) | Andrew Cancio | FT | 9 | TKO | WIN |
21 | Jul 30, 2016 23 years, 8 months 21-0 (12) | Victor Proa | FT | 2 | KO | WIN |
20 | Apr 23, 2016 23 years, 5 months 20-0 (11) | Jayson VĂ©lez | FT | 10 | UD | WIN |
19 | Dec 18, 2015 23 years 19-0 (11) | Hugo Partida | FT | 2 | TKO | WIN |
18 | Oct 23, 2015 22 years, 11 months 18-0 (10) | Ruben Tamayo | 10 | UD | WIN | |
17  | Jul 11, 2015 22 years, 7 months 17-0 (10) | 26 years, 4 months 22-4 (15) | 10 | UD | WIN | |
16 | May 9, 2015 22 years, 5 months 16-0 (10) | Giovanni Delgado | 10 | UD | WIN | |
15 | Mar 6, 2015 22 years, 3 months 15-0 (10) | Juan Luis Hernandez | 3 | TKO | WIN | |
14 | Dec 8, 2014 22 years 14-0 (9) | Jose Angel Beranza | 10 | UD | WIN | |
13 | Nov 13, 2014 21 years, 11 months 13-0 (9) | Roberto Castaneda | 4 | RTD | WIN | |
12 | Sep 29, 2014 21 years, 10 months 12-0 (8) | Raul Hidalgo | 7 | TKO | WIN | |
11 | Jul 9, 2014 21 years, 7 months 11-0 (7) | Ramiro Robles | 10 | UD | WIN | |
10  | Apr 26, 2014 21 years, 5 months 10-0 (7) | 36 years, 1 months 36-12-1 (27) | 6 | UD | WIN | |
9 | Mar 8, 2014 21 years, 3 months 9-0 (7) | Joivany Fuentes | 5 | TKO | WIN | |
8 | Dec 13, 2013 21 years 8-0 (6) | Carlos Rodriguez | 7 | TKO | WIN | |
7 | Aug 24, 2013 20 years, 9 months 7-0 (5) | Noel Mendoza | 3 | KO | WIN | |
6 | Jul 20, 2013 20 years, 7 months 6-0 (4) | Luis Cosme | 1 | KO | WIN | |
5 | Jun 8, 2013 20 years, 6 months 5-0 (3) | Rigoberto Casillas | 3 | RTD | WIN | |
4 | May 3, 2013 20 years, 5 months 4-0 (2) | Eric Gotay | 3 | TKO | WIN | |
3 | Mar 16, 2013 20 years, 3 months 3-0 (1) | Alberto Cupido | 6 | UD | WIN | |
2 | Feb 2, 2013 20 years, 2 months 2-0 (1) | Jose Ruiz | 2 | TKO | WIN | |
1 | Dec 15, 2012 20 years 1-0 (0) | Vicente Afaro Martinez | 4 | UD | WIN |
