Edwin "Chapo" Rosario Rivera (Spanish pronunciation: [ˈeðwin roˈsaɾjo]; March 15, 1963 – 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 (1983–84), and the WBA champion (1986–87) and (1989–90). 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.

EDWIN "CHAPO" ROSARIO:

Leopoldo Frias............................Fight # 08
Pascual Polanco..........................Fight # 09
Javier Flores................................Fight # 11
Refugio Rojas..............................Fight # 14
Rodrigo Aguirre..........................Fight # 15
James Martinez..........................Fight # 16
Ezzard Charles Adams..............Fight # 19
Edwin Viruet................................Fight # 21
Jose Luis Ramirez......................Fight # 22
Roberto Elizondo........................Fight # 23
Howard Davis Jr.........................Fight # 24
Jose Luis Ramirez II..................Fight # 25
Frankie Randall...........................Fight # 28
Roque Montoya..........................Fight # 29
Hector "Macho" Camacho.......Fight # 30
Livingstone Bramble.................Fight # 31
Juan Nazario I.............................Fight # 33
Julio Cesar Chavez....................Fight # 34
Javier Cerna...............................Fight # 36
Rafael Gandarilla.......................Fight # 37
Juan Minaya...............................Fight # 39
Jesus Gallardo...........................Fight # 40
Larry Benson..............................Fight # 41
Anthony Jones..........................Fight # 42
Juan Nazario..............................Fight # 43
Dwayne Swift.............................Fight # 44
Loreto Garza...............................Fight # 45
Akinobu Uiranaka......................Fight # 46
Frankie Randall # 2...................Fight # 48
Maurice Robertson...................Fight # 49
James Moody.............................Fight # 50
Roger Flores...............................Fight # 51
Harold Bennett..........................Fight # 53 (Last fight)