Rocco Francis Marchegiano, also named Rocky Marciano, was born in Massachusetts, the U.S., in September 1923. He was an American boxer who competed from 1947 to 1955. From 1952 to 1956, he held the world heavyweight title. Marciano is the only heavyweight champion to be undefeated during his career. His six title defense opponents were Jersey Joe Walcott, Roland La Starza, Ezzard Charles, Don Cockell, and Archie Moore. Marciano is regarded as one of the greatest heavyweight boxers of all time due to his relentless fighting style, powerful punching power, stamina, and incredibly durable chin. Here's a quiz based on Rocky Marciano.