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SHEBOYGAN, WI - AUGUST 15: Hunter Mahan of the United States plays his shot from the fourth tee during the third round of the 2015 PGA Championship at Whistling Straits at on August 15, 2015 in Sheboygan, Wisconsin. (Photo by Tom Pennington/Getty Images)

SHEBOYGAN, WI - AUGUST 15:  Hunter Mahan of the United States plays his shot from the fourth tee during the third round of the 2015 PGA Championship at Whistling Straits  at  on August 15, 2015 in Sheboygan, Wisconsin.  (Photo by Tom Pennington/Getty Images)