Graeme McDowell autographed 2010 U.S. Open golf cap or hat

2010 U.S. Open (Pebble Beach) blue USGA Member embroidered cap or hat autographed on the bill by Graeme McDowell, who won his first major title at this tournament. Obtained in person, with certificate of authenticity from AutographsForSale.com. ONLY ONE AVAILABLE FOR SALE.