5 Sep 1987
Choi Chang-ho beats Dodie Boy Penalosa via knockout 11/15
Flyweight (112 lb)
Choi Chang-ho becomes the IBF Flyweight world champion
16 Jan 1988
Rolando Bohol beats Choi Chang-ho via split decision 15/15
9 Oct 1988
Khaosai Galaxy beats Choi Chang-ho via knockout 8/12
Super Flyweight (115 lb)