William Stitt Peters (May 1867 – April 2, 1933) was an American baseball, player, manager, and owner who played in predecessor teams to the Negro leagues. Peters played first base and managed the Chicago Unions from 1887 to 1900. After owner Frank Leland moved many of the team's players to the Chicago Union Giants, Peters formed his owned team, the Peters Union Giants. He ran the club until 1923.