Rocco Francis Marchegiano (September 1, 1923 – August 31, 1969), best known as Rocky Marciano (/mɑːrsiˈɑːnoʊ/), was an American professional boxer who competed 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, and is currently ranked by BoxRec as the 29th greatest heavyweight boxer in history. His knockout-to-win percentage of 87.76% remains one of the highest in heavyweight boxing history.
Marciano was born and raised on the south side of Brockton, Massachusetts, to Pierino Marchegiano and Pasqualina Picciuto. Both of his parents were emigrants from Italy. His father was from Ripa Teatina, Abruzzo, while his mother was from San Bartolomeo in Galdo, Campania. Rocky had two brothers, Louis (aka Sonny) and Peter, and three sisters, Alice, Concetta and Elizabeth. When he was about 18 months old, Marciano contracted pneumonia, from which he almost died.