Edwin Rosario vs. Jose Luis Ramirez (1st meeting)
1983-05-01 : Edwin Rosario 134 lbs beat Jose Luis Ramirez 134 lbs by UD in round 12 of 12
- Location: Coliseo Roberto Clemente, San Juan, Puerto Rico
- Referee: Arthur Mercante
- Judge: Arlen Bynum 115-113
- Judge: Lou Filippo 115-113
- Judge: Lou Tabat 115-113
- Vacant WBC Lightweight Title
The fight was for the vacant title, after reigning champ, Alexis Arguello had vacated to move up in weight.
Rosario gained a lead early, then faded late but held on to win by unanimous decision.