Seven boxers who retired as world champions amid rumours Anthony Joshua could quit even if he wins Ruiz Jr rematch – The Sun | The Sun
Top 35 Undefeated Boxers in History (Including Active Boxers) – Fighting Advice
March 1, 1949: Joe Louis... - Daily Black History Facts | Facebook
American boxing champion Rocky Marciano, who retired as undefeated World Heavyweight champion, shows new British professional Pat Dwyer how to lead, at the Cambridge gym, in London, in 1965 Stock Photo - Alamy
TOP 20 BOXERS THAT RETIRED UNDEFEATED - video Dailymotion
Top 35 Undefeated Boxers in History (Including Active Boxers) – Fighting Advice
5 Best Undefeated Boxing Champions In History | Evolve Daily
Boxing History - "The Brockton Blockbuster" Rocky Marciano, the only heavyweight champion to retire undefeated, with a record of 49-0 and 43 knockouts. | Facebook
Who is the greatest boxer without losing and didn't run from any fight? - Quora
Rocky Marciano | Up Close - New England
BOXING: Undefeated champ Andre Ward retires
Andre Ward, undefeated boxing champ, retires. Says desire no longer there. – The Denver Post
10 Best Undefeated Boxers In The History
10 Best Undefeated Boxers In The History
Top 5 Undefeated Boxers of All Time | BetMGM
Boxing: David Haye and 7 Greatest Fighters to Retire with Less Than 30 Bouts | News, Scores, Highlights, Stats, and Rumors | Bleacher Report
The 9 greatest undefeated boxers in history ...
10 Best Undefeated Boxers In The History
Is it possible for a boxer to retire undefeated and then return to the ring without losing? - Quora
On This Day - Apr 27 1956: Rocky Marciano retires as undefeated heavyweight boxing champion of the world – The Irish News
Ten Of The Best Retired Unbeaten Boxers Plus A Few More! - Boxing News 24
