The 1911 U.S. Open was the 17th U.S. Open, held June 23–26 at Chicago Golf Club in Wheaton, Illinois, a suburb west of Chicago. Nineteen-year-old John McDermott became the first American-born champion by defeating Mike Brady and George Simpson in an 18-hole playoff. U.S. Open 1911: June 23–26, 1911 at Chicago Golf Club. Champion: John McDermott, at 307 (+3), playoff. Wiki link