Family dynasty: Ali's daughter, Laila, also became a champion boxer. She retired undefeated. | Business Insider India
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American boxing champion Rocky Marciano , who retired as undefeated... | Boxing champions, Marciano, Sports photos
The Boxing Glove: April 2016
37754745-Rocky Marciano, former boxer. Rocky Marciano 1 September 1923-31 August 1969 . Born Rocco Francis Marchegiano, World Heavyweight Champion 23 September 1952-27 April 1956, retired undefeated. - Daily Mail | Newsprints
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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
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Tyson Fury: The boxers who fight retirement always lose | The Independent
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Seven boxers who retired as world champions amid rumours Anthony Joshua could quit even if he wins Ruiz Jr rematch – The Sun | The Sun
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Are there any boxers who retired undefeated? - Quora
The Namibian - Top 10 Boxers Who Retired Undefeated – From today's The Namibian | Facebook
Nate Diaz will give Jake Paul a 'tougher fight than people realize,' says retired undefeated boxer
