The following year, Norton lost a bruising 15-round fight to Larry Holmes in what many regard as one of boxing's epic heavyweight bouts and would never be champion again. He finished with a record of 42-7-1 and 33 knockouts.
Norton fought only five more times after losing his title to Holmes. His final fight came on Nov. 5, 1981, when he was knocked out in the first round by Gerry Cooney at Madison Square Garden.