<P> 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 is the only world heavyweight champion in professional boxing history to retire undefeated . His six title defenses were against Jersey Joe Walcott , Roland La Starza , Ezzard Charles ( twice ) , Don Cockell and Archie Moore . </P>
<P> 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 is the only world heavyweight champion in professional boxing history to retire undefeated . His six title defenses were against Jersey Joe Walcott , Roland La Starza , Ezzard Charles ( twice ) , Don Cockell and Archie Moore . </P>
who is the only professional boxer to end his career undefeated with a record of 49-0
who is the only professional boxer to end his career undefeated with a record of 49-0
Rocco Francis Marchegiano
Rocco Francis Marchegiano