Matthew Fitzpatrick during the final round of The Open at Muirfield. Picture Eoin Clarke www.golffile.ieMatthew Fitzpatrick, 18, of England, curled in a par putt on the 33rd hole to clinch a 4-and-3 decision over Oliver Goss, 19, of Australia, on Sunday and win the 2013 U.S. Amateur Championship at 7,310-yard, par-70 The Country Club, writes the USGA.