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
Big Breaks Come Early for PH Boxing , by Teodoro Medina Reynoso, PhilBoxing.com
05 Feb 2020
TADURAN REMAINS ONE OF THE FOUR PINOY WORLD CHAMPIONS , by Maloney L. Samaco, PhilBoxing.com
03 Feb 2020
Snips and Snipes 30 January 2020 , by Eric Armit, PhilBoxing.com
31 Jan 2020
THE EXCITING BANTAMWEIGHT DIVISION , by Maloney L. Samaco, PhilBoxing.com
31 Jan 2020
INOUE HAS DEFEATED FOUR FILIPINO BOXERS , by Maloney L. Samaco, PhilBoxing.com
26 Jan 2020
Snips and Snipes 16 January 2020: Wilder-Fury Buildup , by Eric Armit, PhilBoxing.com
17 Jan 2020
A wish for the new year: 20 fights we want to see in 2020 , by Steve Kim, ESPN.com ↗
02 Jan 2020
MB Sports Yearender: An ageless ring warrior and a rising star provide fireworks , by Nick Giongco, The Manila Bulletin ↗
31 Dec 2019
Shawn Porter, ex-Manny Pacquiao sparmate, aching to face his former boss , by Nick Giongco, The Manila Bulletin ↗
16 Dec 2019
As PH Wraps Ups SEA Games Hosting, Ancajas, Tapales Fight for World Titles , by Teodoro Medina Reynoso, PhilBoxing.com
06 Dec 2019
Marlon Tapales and Ryosuke Iwasa ready for Showtime showcase , by Scott Christ, Bad Left Hook ↗
05 Dec 2019
BROOKLYN MEDIA WORKOUT QUOTES , PhilBoxing.com
05 Dec 2019
The Past Week in Action 3 December 2019 , by Eric Armit, PhilBoxing.com
04 Dec 2019
Zolani Tete torn apart in three rounds , by David Isaacson, Sowetan Live ↗
02 Dec 2019
Zolani Tete backed to prove 'best bantemweight' tag , by Frank Warren, Daily Star (UK) ↗
30 Nov 2019
Zolani Tete dispels fears of ring rust in title fight , by Bongani Magasela, Sowetan Live ↗
29 Nov 2019
MISSION POSSIBLE: Conquering Zolani Tete , by Homer D. Sayson, PhilBoxing.com
29 Nov 2019
MIDLANDS MAYHEM PRESS CONFERENCE QUOTES , PhilBoxing.com
28 Nov 2019
Manny Pacquiao 'Very keen' to fight Errol Spence, reveals key advisor (video) , by Danny Flexen, SecondsOut.com ↗
28 Nov 2019
The Past Week in Action 12 November 2019 , by Eric Armit, PhilBoxing.com
13 Nov 2019
Comments
Share your thoughts on John Riel Casimero.