 An examination by ESPN and ABC of the ten most influential figures in sports during the twentieth century. The top ten: 1) Branch Rickey, 2) Pete Rozelle, 3) Roone Arledge, 4) Marvin Miller, 5) Kenesaw Mountain Landis, 6) David Stern, 7) Avery Brundage, 8) Walter O Malley, 9) George Halas, and 10) Mark McCormack.