Samuel Serrano vs. Mario Martinez (of Nicaragua)

Date: 1978-02-18
Location: Coliseo Roberto Clemente, San Juan, Puerto Rico
Referee: <a class="external autonumber" href="https://boxrec.com/en/referee/401158" target="_BLANK">Roberto Ramirez Sr 150-135
Judge: <a class="external autonumber" href="https://boxrec.com/en/judge/402128" target="_BLANK">Ismael Fernandez 150-136
Judge: <a class="external autonumber" href="https://boxrec.com/en/judge/402316" target="_BLANK">Cesar Ramos 150-136

Notes

This Mario Martinez was not the Mexican one who fought Julio Cesar Chavez, Sr. and Azumah Nelson later; but one from Nicaragua instead.