Marvelous Marvin Hagler (born Marvin Nathaniel Hagler; May 23, 1954) is an American former professional boxer who competed from 1973 to 1987.
Marvelous Marvin Hagler (născut Marvin Nathaniel Hagler; 23 mai 1954) este un fost boxer profesionist american care a luptat din 1973 până în 1987.