SHEBOYGAN, WI - AUGUST 11: Dustin Johnson of the United States walks up to a fairway during a practice round prior to the 2015 PGA Championship at Whistling Straits on August 11, 2015 in Sheboygan, Wisconsin. (Photo by Kevin C. Cox/Getty Images)
SHEBOYGAN, WI - AUGUST 11: Dustin Johnson of the United States walks up to a fairway during a practice round prior to the 2015 PGA Championship at Whistling Straits on August 11, 2015 in Sheboygan, Wisconsin. (Photo by Kevin C. Cox/Getty Images)