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
Leon Spinks vs. Muhammad Ali II Leon Spinks vs. Muhammad Ali II Leon Spinks vs. Muhammad Ali II, was a professional boxing match contested on September 15, 1978 in New Orleans for the WBA and Lineal Heavyweight Championships. The fight was estimated to have been watched by a record 2billion viewers worldwide, in some 80 nations. After his shock win over Ali to become Heavyweight champion, Leon Spinks was stripped of the WBC belt for not facing its number one ranked contender Ken Norton, instead he agreed to a rematch with Ali. Ali entered the rematch as a 2½ to 1 favorite. ABC televised the fight