Rocky Marciano Retires This Day April 27, 1956, aged 32.
He finished his career at 49–0.
Rocky compete from 1947 to 1955. He held the world heavyweight title from 1952 to 1956, and retired undefeated as champion. His six title defenses were against Jersey Joe Walcott, Roland La Starza, Ezzard Charles (twice), Don Cockell and Archie Moore.
Known for his relentless fighting style, formidable punching power, stamina, and exceptionally durable chin, Marciano has been included by boxing historians in lists of the greatest boxers of all time. His knockout-to-win percentage of 87.76% remains one of the highest in heavyweight boxing history.