Juan Nazario has four losses against four opponents on his boxing record. For a list of Nazario's best fights, refer to "Best fights of Juan Nazario".
On December 9, 1992 Juan Nazario faced off against Silverio Flores in a lightweight bout at age 29. He was coming in with a record of 24-4 (17). Nazario lost the fight via 2nd-round KO.
On August 11, 1990 Juan Nazario, the WBA champion, met Pernell Whitaker, the WBC and IBF champion, in a lightweight world-title unification fight. Nazario was 26 years old and with a record of 22-3 (16), and Whitaker was 26 years old and with a record of 22-1 (12). Nazario lost the fight via 1st-round KO and lost his title.
On August 11, 1987 Juan Nazario fought Edwin Rosario in a lightweight world-title fight for Rosario's WBA title. Nazario was 23 years old and with a record of 18-2 (12), and Rosario was 24 years old and with a record of 30-2 (26). Nazario lost the fight via 8th-round TKO.
On October 2, 1982 Juan Nazario faced off against Adriano Arreola at age 19. He was coming in with a record of 5-1 (2). Nazario lost the fight via 6-round points decision.
