14 Aug 1998
Ruben Sanchez Leon beats Carlos Salazar via technical decision 8/12
Flyweight (112 lb)
Ruben Sanchez Leon becomes the WBO Flyweight world champion
18 Dec 1998
Ruben Sanchez Leon beats Salvatore Fanni via unanimous decision 12/12
23 Apr 1999
Jose Antonio Lopez Bueno beats Ruben Sanchez Leon via knockout 3/12