Robert Suter Clack
- Bats Right, Throws Right
- Height 5' 9", Weight 153 lb.
- Debut May 13, 1874
- Final Game October 9, 1876
- Born June 13, 1850 in Shoreditch, London, England
- Died October 22, 1933 in Danvers, MA USA
The book Stand and Deliver: A History of Pinch-Hitting says that Clack may have been the first pinch-hitter in the National League on May 13, 1876. In addition to his playing record in 1876, he umpired five games.