RM
Ryūsei Matsumoto
JapanMinimumweight (105 lbs)7-0-0 (5 KO)men's
WBA
Former ChampionMinimumweight Division
| Belt | Champion |
|---|---|
| WBA | Oscar Collazo |
| WBC | Melvin Jerusalem |
| IBF | Pedro Taduran |
| WBO | Oscar Collazo |
Division Status: FragmentedFragmentation: 67%
| Belt | Champion |
|---|---|
| WBA | Oscar Collazo |
| WBC | Melvin Jerusalem |
| IBF | Pedro Taduran |
| WBO | Oscar Collazo |