The 1927 U.S. Open was the 31st U.S. Open, held June 14–17 at Oakmont Country Club in Oakmont, Pennsylvania, a suburb northeast of Pittsburgh. Tommy Armour defeated Harry Cooper in an 18-hole playoff to win the first of his three major titles. U.S. Open 1927: June 14–17, 1927 at Oakmont Country Club. Champion: Tommy Armour, at 301 (+13), playoff. Wiki link