Gene Tunney UD 10 Jack Dempsey, September 22, 1927

Few champions in history have known the kind of adulation Jack Dempsey enjoyed. The Manassa Mauler won the heavyweight belt from the Jess Willard in 1919, a giant of more than 6'6 ½", who Dempsey dropped seven times in the first round. 

That title win by Dempsey launched the first "Golden Age" of the sport. Dempsey was rivaled only by Babe Ruth in terms of mainstream popularity during the 1920s.