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SHEBOYGAN, WI - AUGUST 16: Jason Day of Australia celebrates on the 18th green after winning the 2015 PGA Championship with a score of 20-under par at Whistling Straits on August 16, 2015 in Sheboygan, Wisconsin. (Photo by Mike Ehrmann/PGA of America via Getty Images)

SHEBOYGAN, WI - AUGUST 16:  Jason Day of Australia celebrates on the 18th green after winning the 2015 PGA Championship with a score of 20-under par at Whistling Straits on August 16, 2015 in Sheboygan, Wisconsin.  (Photo by Mike Ehrmann/PGA of America via Getty Images)