Marvin Marvelous Hagler (born on May 23, 1954, in Newark, New Jersey) is an American former boxer. He was the world middleweight champion from 1980 to 1987. Hagler fought out of Brockton, Massachusetts. He won the championship from Alan Minter, in London, and successfully defended it eleven times before losing in a controversial fight with Sugar Ray Leonard. Hagler retired after that fight to live and work in Italy.