Marvelous Marvin Hagler, the boxing legend who was the undisputed middleweight champion from 1980 to 1987 and recorded 52 knockouts during his career, has died, his wife announced Saturday. He was 66.

Marvelous Marvin Hagler, the boxing legend who was the undisputed middleweight champion from 1980 to 1987 and recorded 52 knockouts during his career, has died, his wife announced Saturday. He was 66.