William Hackney Warren (Hack)
- Bats Right, Throws Right
- Height 5' 8½", Weight 165 lb.
- Debut April 30, 1914
- Final Game May 23, 1915
- Born February 11, 1883 in Missouri USA
- Died January 28, 1960 in Whiteville, TN USA
Bill is one of five major leaguers (through 2019) born in Cairo, IL, in far southern Illinois. His first Federal League team, the 1914 Indianapolis Hoosiers, won the pennant. The team then moved east and became the 1915 Newark Pepper. Bill's pro career ended abruptly during the game on May 23, 1915, when he broke a finger.