Edwin "Chapo" Rosario Rivera (Spanish pronunciation: ['eΓ°win ro'sa?jo]; March 15, 1963 β December 1, 1997) was a world champion professional boxer who competed from 1979 to 1997.
He won the lightweight championship of the world three times, as the WBC lightweight champion (1983β84), and the WBA champion (1986β87) and (1989β90).
Rosario won a 4th world championship after moving up to the junior welterweight division by claiming the WBA title, holding that crown from 1991 to 1992.
Rosario was posthumously inducted into the International Boxing Hall of Fame in 2006.