Known as "The Mouse", he is a 3-time WBC Super Bantamweight Champion and International Boxing Hall of Famer.
He represented Mexico as a Bantamweight at the 1980 Moscow Olympic Games as an amateur.
He became the oldest Super Bantamweight Champion in history at 36 years and 11 months.
His was born and raised in Mexico City, Mexico.
He took the WBC Bantamweight title vacted by Alberto Davila in 1985.