U.S. Open 2013 (51 images)

Geoffrey Sisk hits a tee shot on the 14th hole in the first round at the 113th U.S. Open at Merion Golf Club in Ardmore, Pennsylvania on June 13, 2013. UPI/John Angelillo

A boy watches golf on the 14th tee box in the first round at the 113th U.S. Open at Merion Golf Club in Ardmore, Pennsylvania on June 13, 2013. UPI/John Angelillo

Tim Clark hits an iron in the first hole fairway in the first round at the 113th U.S. Open at Merion Golf Club in Ardmore, Pennsylvania on June 13, 2013. UPI/John Angelillo

Padraig Harrington reacts after failing to hit out of a bunker on the 17th green during the first round of the 113th U.S. Open Championship at Merion Golf Club in Ardmore, Pennsylvania on June 13, 2013. UPI/Kevin Dietsch