The 1910 U.S. Open was the sixteenth U.S. Open, held June 17–20 at Philadelphia Cricket Club in Chestnut Hill, Pennsylvania, a neighborhood of northwest Philadelphia. Alex Smith, the champion four years earlier, prevailed in an 18-hole playoff over his younger brother Macdonald Smith and 18-year-old John McDermott to win his second U.S. Open. U.S. Open 1910: June 17–20, 1910 at Philadelphia Cricket Club. Champion: Alex Smith, at 298 (+6) — 2nd major title. Wiki link