Here is a list of Rosario's best fights. For a list of Rosario's losses, refer to "Edwin Rosario Losses".
On May 1, 1983 Edwin Rosario fought José Luis Ramírez in a lightweight world-title fight for the WBC title. Rosario was 20 years old and with a record of 22-0 (20), and Ramírez was 24 years old and with a record of 82-4 (69). Rosario won the fight via 12-round unanimous decision and is crowned the new lightweight world champion.
On September 26, 1986 Edwin Rosario fought Livingstone Bramble in a lightweight world-title fight for Bramble's WBA title. Rosario was 23 years old and with a record of 29-2 (25), and Bramble was 26 years old and with a record of 24-1-1 (15). Rosario stopped Livingstone Bramble via 2nd-round KO and is crowned the new lightweight world champion.
On August 11, 1987 Edwin Rosario met Juan Nazario in a lightweight (WBA) world-title defense fight. Rosario was 24 years old and with a record of 31-2 (27), and Nazario was 23 years old and with a record of 18-1 (12). Rosario stopped Juan Nazario via 8th-round TKO and successfully defended his title.
On March 17, 1984 Edwin Rosario met Roberto Elizondo in a lightweight (WBC) world-title defense fight. Rosario was 21 years old and with a record of 23-0 (21). Rosario stopped Roberto Elizondo via 1st-round TKO and successfully defended his title.
