Chris John vs. Oscar Leon
2003-09-26 : Chris John 126 lbs beat Oscar Leon 126 lbs by SD in round 12 of 12
- Location: Kartika Plaza Hotel, Kuta, Indonesia
- Referee: Mark Nelson
- Judge: Dr Ruben M Garcia 116-111
- Judge: Kwan-Ho Jang 116-113
- Judge: Guillermo Perez Pineda 112-116
- World Boxing Association Featherweight Title (Interim title)
- Weights: 126 lbs (each)
- Leon was knocked down in round 11.
- Interim title commissioned when reigning champ Derrick Gainer unable to defend due to an injury.
- John's interim title was soon upgraded to featherweight WBA regular title, after Derrick Gainer's loss to Juan Manuel Marquez, Marquez became WBA Super Champion status (126 lbs. IBF+WBA titles).