Muhammad Ali 21 during an elimination bout following Rocky Marciano's retirement. Mike Tyson broke both records in 1986 when he defeated Trevor Berbick to win the heavyweight title at age 20. Soon after the Liston fight, Clay changed his name to Cassius X, and then later to Muhammad Ali upon converting to Islam and affiliating with the Nation of Islam. Ali then faced a rematch with Liston scheduled for May 1965 in Lewiston, Maine. It had been scheduled for Boston the previous November, but was postponed for six months due to Ali's emergency surgery for a hernia three days before. The fight
Muhammad Ali vs. Earnie Shavers Muhammad Ali vs. Earnie Shavers Muhammad Ali and Earnie Shavers fought each other in a fifteen-round boxing match on September 29, 1977. The fight went the full distance with Ali emerging the winner through a unanimous decision. Ali was badly hit in the second round, but by pretending to be even more hurt than he was, deceived Shavers into thinking he was play-acting resulting in Shavers not going for a knockout. By finishing each round strongly, Ali won favor with the judges. Shavers put up a strong performance in the 13th and 14th rounds, but Ali finished the 15th round