John Riel “Quadro Alas” Casimero
📍 Place of Birth: Ormoc City, Philippines
36
Wins
–
5
Losses
–
1
Draws
·
25
KOs
Ranking August 2026:
IBF #10
WBO #4
IBO #1
Career: 2007 –
present
Belts Won
World Titles
WBO
WBO World
Bantamweight
Won: Nov 30, 2019 TKO R3 Zolani Tete; 2 DefensesLost: Aug 14, 2022 Vacated
WBO
WBO Interim
Bantamweight
Won: Apr 20, 2019 KO R12 Ricardo Espinoza
Franco; 1 DefenseLost: Aug 23, 2020 Vacated
IBF
IBF World
Flyweight
Won: May 25, 2016 KO R4 Amnat Ruenroeng; 1 DefenseLost: Sep 10, 2017 Vacated
IBF
IBF World
Light Flyweight
Won: Aug 04, 2012 SD Pedro Guevara; 3 DefensesLost: May 03, 2015 Vacated
IBF
IBF Interim
Light Flyweight
Won: Feb 10, 2012 TKO R10 Luis Alberto
LazarteLost: Feb 09, 2013 Vacated
WBO
WBO Interim
Light Flyweight
Won: Dec 19, 2009 TKO R11 Cesar CanchilaLost: Jul 24, 2010 SD Ramon Garcia
Regional Belts
WBO
WBO Global
Super Bantamweight
Won: May 13, 2023 UD Fillipus NghitumbwaLost: May 12, 2024 Vacated
WBO
WBO Asia Pacific
Light Flyweight
Won: Oct 03, 2008 TKO R5 Phaiboon Chumthong; 1 DefenseLost: May 28, 2010 Vacated
Philippines
Philippines PBF
Flyweight
Won: Aug 23, 2008 UD Rodel QuilatonLost: Aug 23, 2009 Vacated
About John Riel Casimero
John Riel Reponte Casimero (born February 13, 1989) is a Filipino professional boxer and YouTuber, recognized as a three-division world champion. He held the IBF junior-flyweight title (2012–2013), the IBF flyweight title (2016), and the WBO bantamweight title (2019–2022). Known for his explosive style and resilience, Casimero has scored notable victories over César Canchila, Amnat Ruenroeng, Zolani Tete, and Guillermo Rigondeaux. Despite controversies outside the ring, his career achievements across multiple weight classes have established him as one of the Philippines’ most accomplished fighters in the modern era.
Read full article on Wikipedia ↗
Bio last updated: 20 Apr 2026
Fight Record 42 bouts
John Riel Casimero Also Mentioned In 475 articles
← Back to Headlines
ALBERT PAGARA TRAINS AT WILD CARD GYM , by Maloney L. Samaco, PhilBoxing.com
29 May 2016
Quijano: Johnreil ruins Ruenroeng , by Jingo Quijano, Sun.Star Cebu ↗
28 May 2016
Quijano: Passing the Pacquiao torch (conclusion) , by Jingo Quijano, Sun.Star Cebu ↗
03 Feb 2016
Manny out to regain crown PRO Boxing Yearender (Last of 2 Parts) , by Joaquin Henson, The Philippine Star ↗
04 Jan 2016
Pacquiao?s luster undimmed despite loss to Mayweather , by Nick Giongco, The Manila Bulletin ↗
26 Dec 2015
Manager sues Ormoc boxing champion for P1.2 million , by Ador Vincent S. Mayol, Cebu Daily News ↗
22 Aug 2015
Quijano: Ruined by Ruenroeng II , by Jingo Quijano, Sun.Star Cebu ↗
05 Jul 2015
SONSONA CONTINUES TOUGH U.S. TRAINING , by Rene Bonsubre, Jr., PhilBoxing.com
08 Apr 2015
Marvelous Training Camp Begins! Sonsona Arrives in Vegas , PhilBoxing.com
08 Feb 2015
Quijano: State of Philipping boxing , by Jingo Quijano, Sun.Star Cebu ↗
18 Jan 2015
Seventeen fights for 2014 ? Did they happen? , by Phil D. Jay, World Boxing News ↗
02 Jan 2015
2014 THE YEAR IN PHILIPPINE BOXING PART I , by Rene Bonsubre, Jr., PhilBoxing.com
31 Dec 2014
Bradley still among the best , SuperSport ↗
15 Dec 2014
Post Fight Chaos and One Dirty Mosquito , by Ted Sares, RingNews24 ↗
27 Oct 2014
Donnie Nietes knocks out Moises Fuentes to retain WBO title , by Carlo Pamintuan, Yahoo! Sports ↗
11 May 2014
Giovani Segura entertains with 10th-round KO of Felipe Salguero , by Francisco Salazar, RingTV.com ↗
07 Apr 2014
MTHALANE-OLIVA IBO TITLE FIGHT TODAY , PhilBoxing.com
15 Mar 2014
OLIVA GOES TO SOUTH AFRICA TO FACE MTHALANE , by Rene Bonsubre, Jr., PhilBoxing.com
04 Mar 2014
Shiming on the Fast Track? , by Steve Kim, MaxBoxing.com ↗
21 Feb 2014
Quijano: 5 Pinoys make it to Ring 100 , by Jingo Quijano, Sun.Star Cebu ↗
28 Jan 2014
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