John Riel Casimero

John Riel Casimero was born in Merida, Leyte, Philippines on February 13, 1989. He made his professional debut at the age of 18 years on June 3, 2007 against Lobert Bayo. Casimero defeated Bayo via 4-round unanimous decision, making a successful beginning of his pro career.

Casimero got his first shot at a world title at the age of 22 after 15 professional fights. On March 26, 2011 Casimero challenged Moruti Mthalane's IBF flyweight title but lost via 5th round TKO.

He then got elevated as the IBF light-flyweight champion at the age of 23 after 19 professional fights, and had his first world-title defense fight against Pedro Guevara on August 4, 2012. He defeated Guevara via 12-round split decision.

Casimero then went on to successfully conquer the flyweight (IBF) and bantamweight (WBO) divisions as well to become a three-division world champion.

Casimero's latest fight was a 1st-round TKO victory over Saul Sanchez at age 35, on October 13, 2024.

Some of John Riel Casimero's best fights so far have been against Zolani Tete, Guillermo Rigondeaux, Amnat Ruenroeng, Ricardo Espinoza Franco, Luis Alberto Lazarte, Pedro Guevara, and Ryo Akaho. For a complete list of Casimero's best fights and their details, refer to "Best fights of John Riel Casimero".

Casimero has 4 losses on his record. For details about these losses refer to "John Riel Casimero Losses".