Marvelous Marvin Hagler (born Marvin Nathaniel Hagler in Newark, New Jersey, May 23, 1954), is an American former boxer.

He finished his boxing career with a record of 63-3-2 with 52 knockouts.

A native of Brockton, Massachusetts, in 1973 he was National AAU 165 pound champion, after defeating Terry Dobbs of Atlanta and the Marine Corps, in the final. Hagler was named the outstanding boxer of the tournament, after winning four fights; two by knockout and two by decision.
Source : Wikipedia