27 Apr 1996
Saman Sorjaturong beats Joma Gamboa via knockout 7/12
Light Flyweight (108 lb)
20 Feb 1999
Sompoch Harnvichachai beats Joma Gamboa via unanimous decision 12/12
9 Oct 1999
Noel Arambulet beats Joma Gamboa via unanimous decision 12/12
Minimumweight (105 lb)
20 Aug 2000
Joma Gamboa beats Noel Arambulet via split decision 12/12
Joma Gamboa becomes the WBA Minimumweight world champion
6 Dec 2000
Keitaro Hoshino beats Joma Gamboa via unanimous decision 12/12
29 Jan 2002
10 Jan 2004
Jorge Arce beats Joma Gamboa via knockout 2/12