Rory McIlroy, of Northern Ireland, drives from the second tee during the second round of the U.S. Open Championship golf tournament in Bethesda, Md., Friday, June 17, 2011.

Rory McIlroy, of Northern Ireland, drives from the second tee during the second round of the U.S. Open Championship golf tournament in Bethesda, Md., Friday, June 17, 2011.