Dempsey, called the “Manassa Mauler,” emerged from fights on saloon floors near mining camps to become (1919) the world's heavyweight champion and one of the major sports figures of the 1920s. He sealed his slugging reputation in his first title fight by knocking down the gigantic champion, Jess Willard, seven times in the first three minutes. Dempsey held the crown until losing to Gene Tunney in 1926. In a rematch Dempsey knocked down Tunney in the seventh round, but failed to immediately return to his corner, thus allowing Tunney the benefit of a legendary 14-second “long count.” After retirement, he worked occasionally as a referee and spent nearly four decades as proprietor of a popular New York City restaurant.
See Randy Roberts, The Manassa Mauler (1979)