Edwin "Chapo" Rosario Rivera (Spanish pronunciation: [ˈeðwin roˈsaɾjo]; March 15, 1963 – December 1, 1997) was a Puerto Rican professional boxer who competed from 1979 to 1997. He is a world champion in two weight classes, having held the WBC lightweight title from 1983 to 1984, the WBA lightweight title twice between 1986 and 1990, and the WBA super lightweight title from 1991 to 1992. Known for his exceptional boxing skills, dynamite right hand and rock solid chin Rosario's final record stands at 47-6 Rosario was posthumously inducted into the International Boxing Hall of Fame in 2006.