Elmer Ray Riddle was an American professional baseball player. A right-handed pitcher, he appeared in all or parts of ten Major League Baseball (MLB) seasons for the Cincinnati Reds and Pittsburgh Pirates. As a member of the 1941 Reds, he led the National League (NL) in winning percentage and earned run average (ERA) (2.24). Two years later, he tied for the NL and MLB lead in games won, with 21.