HARTFORD, WI - JUNE 12: Si Woo Kim of South Korea plays a shot during a practice round prior to the 2017 U.S. Open at Erin Hills on June 12, 2017 in Hartford, Wisconsin. (Photo by Jamie Squire/Getty Images)
HARTFORD, WI - JUNE 12: Si Woo Kim of South Korea plays a shot during a practice round prior to the 2017 U.S. Open at Erin Hills on June 12, 2017 in Hartford, Wisconsin. (Photo by Jamie Squire/Getty Images)