Rory McIlroy, of Northern Ireland, hits a drive on the sixth hole during the first round of the U.S. Open Championship golf tournament Thursday, June 14, 2012, at The Olympic Club in San Francisco.

Rory McIlroy, of Northern Ireland, hits a drive on the sixth hole during the first round of the U.S. Open Championship golf tournament Thursday, June 14, 2012, at The Olympic Club in San Francisco.