After Rocky Marciano retired, Floyd began aiming at a shot for the vacant heavyweight title. On November 30, 1956, Patterson had two very good things happen in his life. His wife gave birth to his first child, and he beat Archie Moore to become the heavyweight champion of the world. He became the youngest boxing champion ever. He lost the title in 1959 to Ingemar Johanson but he regained it in 1960. In 1962, he lost it again to Sonny Liston. Patterson tried to regain the title two more times from Muhammad Ali in 1965 and 1972. In 1965, he fought for 12 rounds, but on both tries, he failed to win title.