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LOUISVILLE, KY - AUGUST 08: (L-R) Phil Mickelson of the United States and Tiger Woods of the United States walk up the 15th hole during the second round of the 96th PGA Championship at Valhalla Golf Club on August 8, 2014 in Louisville, Kentucky. (Photo by Andy Lyons/Getty Images)

LOUISVILLE, KY - AUGUST 08:  (L-R) Phil Mickelson of the United States and Tiger Woods of the United States walk up the 15th hole during the second round of the 96th PGA Championship at Valhalla Golf Club on August 8, 2014 in Louisville, Kentucky.  (Photo by Andy Lyons/Getty Images)