Chris John vs. Oscar Leon

Chris John 126 lbs beat Oscar Leon 126 lbs by SD in round 12 of 12

• Date: 2003-09-26
• Location: Kartika Plaza Hotel, Kuta, Indonesia
• Referee: Mark Nelson
• Judge: Ruben M Garcia 116-111
• Judge: Guillermo Perez Pineda 112-116
• Judge: Kwan Ho Jang 116-113

• World Boxing Association Featherweight Title (Interim title)
  
• Weights: 126 lbs (each)

Comment(s):

- 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).