What heavyweight champion nicknamed "The Manassa Mauler" starred in Daredevil Jack?
Jack Dempsey: William Harrison "Jack" Dempsey (June 24, 1895 – May 31, 1983), nicknamed "Kid Blackie" and "The Manassa Mauler", was an American professional boxer who competed from 1914 to 1927, and reigned as the world heavyweight champion from 1919 to 1926.
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