Foster, now a star, jumped to the Philadelphia Giants for the 1904 season. Legend has it that John McGraw, manager of the New York Giants, hired Foster to teach the young Christy Mathewson the "fadeaway", or screwball, though historians have cast doubt on this story. During the 1904 season, Foster won 20 games against all competition (including two no-hitters) and lost six. In a rematch with Foster's old team, the Cuban X-Giants, he won two games and batted .400 in leading the Philadelphia Giants to the black championship.
Foster, now a star, jumped to the Philadelphia Giants for the 1904 season. Legend has it that John McGraw, manager of the New York Giants hired Foster to teach the young Christy Mathewson the "fadeaway", or screwball, though historians have cast doubt on this story. During the 1904 season, Foster won 20 games against all competition (including two no-hitters) and lost six. In a rematch with Foster's old team, the Cuban X-Giants, he won two games and batted .400 in leading the Philadelphia Giants to the black championship.