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. Buster Mathis Muhammad Ali vs. Buster Mathis Muhammad Ali and Buster Mathis fought each other in a twelve-round boxing match at the Astrodome in Houston on November 17, 1971.Ali dominated the fight throughout and won easily on points. Ali knocked Mathis down twice in eleventh round and twice again in the final round but refused to move in for a knockout out of compassion for Mathis. Ali had joked before the fight that "I'm going to do to Buster what the Indians did to Custer". One of the fight posters promoting the match said "Be there when the Mountain comes to Muhammad".