Rocky Marciano

Biography

Rocky Marciano retired with 49 wins and zero losses - the only heavyweight champion to finish undefeated. The 87.8% knockout rate speaks to a blunt-force approach: he didn't outbox opponents, he overwhelmed them. Short for a heavyweight at 5'10", he made up for it with conditioning that allowed him to throw punches for 15 rounds without slowing. The punches were awkward, the style ugly, but the results were undeniable. He beat Joe Louis, Jersey Joe Walcott, and Ezzard Charles, champions all. He retired at 32, died in a plane crash at 45, leaving behind a record that has tantalized every heavyweight since. What if he'd kept fighting?

Career Highlights

• 49-0 professional record
• 43 knockouts
• Only undefeated heavyweight champion
• 87.8% KO rate (highest by HW champ)
• Retired at age 32

Learn More