HARTFORD, WI - JUNE 14: Rory McIlroy of Northern Ireland walks across the green during a practice round prior to the 2017 U.S. Open at Erin Hills on June 14, 2017 in Hartford, Wisconsin. (Photo by Ross Kinnaird/Getty Images)
HARTFORD, WI - JUNE 14: Rory McIlroy of Northern Ireland walks across the green during a practice round prior to the 2017 U.S. Open at Erin Hills on June 14, 2017 in Hartford, Wisconsin. (Photo by Ross Kinnaird/Getty Images)