The 1991 U.S. Open was the 91st U.S. Open, held June 13–17 at Hazeltine National Golf Club in Chaska, Minnesota, a suburb southwest of Minneapolis. Payne Stewart defeated 1987 champion Scott Simpson in an 18-hole Monday playoff to win the first of his two U.S. Open titles. It was the second of Stewart's three major championships.Stewart held the lead through each of the first three rounds, but in the final round he found himself trailing Simpson by a stroke heading to the 18th.