Phil Mickelson rubs his head before putting on the ninth hole during 

Phil Mickelson rubs his head before putting on the ninth hole during the fourth round of the U.S. Open golf tournament at Merion Golf Club, Sunday, June 16, 2013, in Ardmore, Pa. (AP Photo/Morry Gash)
Associated Press
Phil Mickelson rubs his head before putting on the ninth hole during the fourth round of the U.S. Open golf tournament at Merion Golf Club, Sunday, June 16, 2013, in Ardmore, Pa. (AP Photo/Morry Gash)
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