Rocky Marciano (born Rocco Francis Marchegiano; September 1, 1923 – August 31, 1969) was an American professional boxer who held the world heavyweight title from September 23, 1952 to April 27, 1956. Marciano went undefeated in his career and defended his title six times, against Jersey Joe Walcott, Roland La Starza, Ezzard Charles (twice), Don Cockell, and Archie Moore.