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Dempsey knocks out Brennan to retain world heavyweight crown – archive, 1920 | Boxing | The Guardian
Boxing History - Jack Dempsey "The Nonpareil," 1880s and 90s middleweight champion who inspired heavyweight champion Jack Dempsey's name. The Nonpareil was said to be better fighting bare knuckle or with skin
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In the Ring With Jack Dempsey - Part I: The Making of a Champion: 9781949783018: Pollack, Adam J: Books - Amazon.com
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Revisit the Brutal Fight When Jack Dempsey Hammered the Super-Sized Champ to Claim Title | At the Smithsonian| Smithsonian Magazine
Sports Heroes Who Served: World Heavyweight Boxing Champion Served in WWII > U.S. Department of Defense > Story
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