SHEBOYGAN, WI - AUGUST 10: Rory McIlroy of Northern Ireland hits a tee shot during a practice round prior to the 2015 PGA Championship at Whistling Straits on on August 10, 2015 in Sheboygan, Wisconsin. (Photo by Andrew Redington/Getty Images)
SHEBOYGAN, WI - AUGUST 10: Rory McIlroy of Northern Ireland hits a tee shot during a practice round prior to the 2015 PGA Championship at Whistling Straits on on August 10, 2015 in Sheboygan, Wisconsin. (Photo by Andrew Redington/Getty Images)