The only heavyweight boxing champion to retire undefeated, he held the title from 1952-1956.
Rocky Marciano who was born Rocco Marchegianon. His last name was changed when a ring announcer was unable to pronounce it. After his retirement as a boxer, Marciano hosted a boxing show on TV and served as a referee and a commentator. He died in a plane crash the day before his 46th birthday.
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