John Riel Casimero
- Nickname: Quadro Alas
- Date of Birth: 13th February 1989 (36 years old)
- Career duration: 17 years 10 months
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Nationality:
Philippines -
Birthplace:
Ormoc City, Leyte, Philippines
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Residence:
Ormoc City, Leyte, Philippines
- Division: Bantamweight
- Reach: 64.2"
- Height: 5ft 4"
- Stance: Orthodox
- BoxRec: John Riel Casimero
- Debut: 3rd June 2007
