2 / 16

U.S. Open - Round Four

ARDMORE, PA - JUNE 16: Jason Dufner of the United States pulls a club from his bag on the 18th tee alongside caddie Kevin Baile during the final round of the 113th U.S. Open at Merion Golf Club on June 16, 2013 in Ardmore, Pennsylvania. (Photo by David Cannon/Getty Images)