[1] Results were: He won the Lineal and WBA Bantamweight title on 14 March 1975 when he knocked out Soo-Hwan Hong in four rounds, two years after turning pro.

Later that year, he successfully defended his title via knockout against Gilberto Illueca and a rematch with Soo-Hwan Hong.

Fighting contemporaneously, and holding the WBC crown, was the fellow-Mexican legend, Carlos Zárate Serna.

In a largely anticipated fight Zarate scored a technical knockout over Zamora in the fourth round.

In his next fight he lost his Lineal and WBA Bantamweight titles to Jorge Luján by knockout in the tenth round.