Rocky Marciano holds one of the greatest records in boxing after ending his career early as an undefeated world heavyweight boxing champion at the age of 31.
On April 27, 1956, Marciano and his manager, Al Weill, announced his retirement at a press conference at New York City's Hotel Shelton. Marciano, who went 49–0 with 43 KOs, said he wanted to retire to spend more time with his family. The sports world was stunned. Many boxers had retired only to later make comebacks, and people immediately wondered if Marciano would change his mind and eventually return to the ring.