O'Brien, Tommy O'Dea, Ken O'Dea, Paul O'Doul, Lefty O'Farrell, Bob * Ogden, Jack Oliver, Tom Olmo, Luis Olsen, Vern Onis, Ralph Orengo, Joe O'Rourke, Blackie Orrell, Joe Orsatti, Ernie Orwoll, Ossie Osborn, Bob Ostermueller, Fritz Ostrowski, Joe Ott, Mel Outlaw, Jimmy * Overmire, Stubby Owen, Marv Owen, Mickey *