John Riel Casimero (34-4-1, 23) was born in Merida, Leyte, Philippines on February 13, 1989. At the age of 18 years on June 3, 2007, he made his professional boxing debut against Lobert Bayo, winning the fight via 4-round unanimous decision.
On his 16th career fight at 22 years old, John Riel Casimero got a shot at the IBF flyweight titles against Moruti Mthalane on March 26, 2011 but lost the fight via 5th-round TKO.
He became a light-flyweight world champion (IBF) on August 4, 2012 at the age of 23 years old, on his 19th career fight, after defeating Pedro Guevara via 12-round split decision.
He then went on to become world champion at the bantamweight weight class as well, winning the WBO title against Zolani Tete via 3rd-round TKO on November 30, 2019.
Casimero's last fight was a 1st-round TKO win against Saul Sanchez at age 35 on October 13, 2024. He is on a 1-fight winning streak.
Some of John Riel Casimero's best fights have been against Luis Alberto Lazarte, Ricardo Espinoza Franco, Zolani Tete, Pedro Guevara, Ryo Akaho, Guillermo Rigondeaux and Duke Micah.
Casimero has 4 losses on his boxing record.
| # | Date | Opponent | Weight | Round | Method | Result |
|---|---|---|---|---|---|---|
39  | Oct 13, 2024 35 years, 8 months 34-4-1 (23) | 27 years, 4 months 21-3 (12) | SBT | 1 | TKO | WIN |
38 | Oct 12, 2023 34 years, 7 months 33-4-1 (22) | Yukinori Oguni | SBT | 4 | TD | DRAW |
37 | May 13, 2023 34 years, 3 months 33-4 (22) | Fillipus Nghitumbwa | SBT | 12 | UD | WIN |
36  | Dec 3, 2022 33 years, 9 months 32-4 (22) | 36 years, 5 months 39-2-2 (26) | SBT | 2 | KO | WIN |
35  | Aug 14, 2021 32 years, 6 months 31-4 (21) | 40 years, 10 months 20-1 (13) | BT | 12 | SD | WIN Defended WBO |
34  | Sep 26, 2020 31 years, 7 months 30-4 (21) | 29 years 24-0 (19) | BT | 3 | TKO | WIN Defended WBO |
33  | Nov 30, 2019 30 years, 9 months 29-4 (20) | 31 years, 8 months 28-3 (21) | BT | 3 | TKO | WIN Won WBO |
32 | Aug 24, 2019 30 years, 6 months 28-4 (19) | Cesar Ramirez | BT | 10 | KO | WIN Defended WBO Interim |
31  | Apr 20, 2019 30 years, 2 months 27-4 (18) | 21 years, 8 months 23-2 (20) | BT | 12 | KO | WIN Won WBO Interim |
30 | Feb 16, 2019 30 years 26-4 (17) | Kenya Yamashita | FL | 6 | TKO | WIN |
29 | Jul 21, 2018 29 years, 5 months 25-4 (16) | Jose Pech | FL | 2 | TKO | WIN |
28  | Sep 16, 2017 28 years, 7 months 24-4 (15) | 25 years, 9 months 13-3 (8) | FL | 12 | UD | LOSS |
27 | Jun 25, 2017 28 years, 4 months 24-3 (15) | Jecker Buhawe | FL | 6 | UD | WIN |
26  | Sep 10, 2016 27 years, 6 months 23-3 (15) | 23 years, 7 months 8-0 (3) | FL | 10 | TKO | WIN Defended IBF |
25  | May 25, 2016 27 years, 3 months 22-3 (14) | 36 years, 5 months 17-0 (5) | FL | 4 | KO | WIN Won IBF |
24 | Jun 27, 2015 26 years, 4 months 21-3 (13) | 35 years, 6 months 15-0 (5) | FL | 12 | UD | LOSS For IBF |
23 | Dec 13, 2014 25 years, 10 months 21-2 (13) | Armando Santos | LFL | 2 | TKO | WIN |
22 | May 3, 2014 25 years, 2 months 20-2 (12) | Mauricio Fuentes | LFL | 1 | KO | WIN |
21 | Oct 26, 2013 24 years, 8 months 19-2 (11) | Felipe Salguero | LFL | 11 | TKO | WIN Defended IBF |
20 | Mar 16, 2013 24 years, 1 months 18-2 (10) | Luis Alberto Rios | LFL | 12 | UD | WIN Defended IBF |
19  | Aug 4, 2012 23 years, 5 months 17-2 (10) | 23 years, 1 months 18-0-1 (13) | LFL | 12 | SD | WIN Defended IBF |
18  | Feb 10, 2012 22 years, 11 months 16-2 (10) | 40 years, 11 months 49-10-2 (18) | LFL | 10 | TKO | WIN Won IBF Interim |
17 | Oct 15, 2011 22 years, 8 months 15-2 (9) | Roemart Sentillas | FL | 2 | TKO | WIN |
16  | Mar 26, 2011 22 years, 1 months 14-2 (8) | 28 years, 5 months 26-2 (17) | FL | 5 | TKO | LOSS For IBF |
15 | Jul 24, 2010 21 years, 5 months 14-1 (8) | RamĂłn GarcĂa Hirales | LFL | 12 | SD | LOSS Lost WBO Interim |
14 | Dec 19, 2009 20 years, 10 months 14-0 (8) | CĂ©sar Canchila | LFL | 11 | TKO | WIN Won WBO Interim |
13 | May 28, 2009 20 years, 3 months 13-0 (7) | Ardin Diale | LFL | 8 | KO | WIN |
12 | May 8, 2009 20 years, 2 months 12-0 (6) | Allan Ranada | LFL | 8 | UD | WIN |
11 | Oct 3, 2008 19 years, 7 months 11-0 (6) | Phaiboon Chumthong | LFL | 5 | TKO | WIN |
10 | Aug 23, 2008 19 years, 6 months 10-0 (5) | Rodel Quilaton | FL | 10 | UD | WIN |
9 | Jul 17, 2008 19 years, 5 months 9-0 (5) | Roemart Sentillas | 3 | TKO | WIN | |
8 | Jun 12, 2008 19 years, 3 months 8-0 (4) | Roel Honor | 1 | TKO | WIN | |
7 | Apr 21, 2008 19 years, 2 months 7-0 (3) | Daryl Amoncio | 8 | MD | WIN | |
6 | Mar 29, 2008 19 years, 1 months 6-0 (3) | Jerome Bontog | 3 | KO | WIN | |
5 | Jan 12, 2008 18 years, 10 months 5-0 (2) | Rogen Flores | 6 | TD | WIN | |
4 | Dec 16, 2007 18 years, 10 months 4-0 (2) | Dodong Zalde | 2 | KO | WIN | |
3 | Aug 26, 2007 18 years, 6 months 3-0 (1) | Roel Honor | 6 | UD | WIN | |
2 | Aug 16, 2007 18 years, 6 months 2-0 (1) | Andrew Pal | 2 | TKO | WIN | |
1 | Jun 3, 2007 18 years, 3 months 1-0 (0) | Lobert Bayo | 4 | UD | WIN |
