Tiger Woods at the U.S. Open

Tiger Woods seized the lead June 15 in the second round of the U.S. Open on the Olympic Club Lake course in San Francisco.

Tiger Woods hits a drive on the second hole during the second round of the U.S. Open Championship golf tournament Friday, June 15, 2012, at The Olympic Club in San Francisco. (AP Photo/Eric Risberg)

Tiger Woods reacts after making a birdie on the 10th hole during the second round of the U.S. Open Championship golf tournament Friday, June 15, 2012, at The Olympic Club in San Francisco. (AP Photo/Ben Margot)

Tiger Woods drops his club after a shot on the sixth hole during the second round of the U.S. Open Championship golf tournament Friday, June 15, 2012, at The Olympic Club in San Francisco. (AP Photo/Ben Margot)

U.S. Open - Round Two

SAN FRANCISCO, CA - JUNE 15: Tiger Woods of the United States walks off the third tee during the second round of the 112th U.S. Open at The Olympic Club on June 15, 2012 in San Francisco, California. (Photo by Stuart Franklin/Getty Images)

U.S. Open - Round Two

SAN FRANCISCO, CA - JUNE 15: Tiger Woods of the United States reacts to his tee shot on the second hole during the second round of the 112th U.S. Open at The Olympic Club on June 15, 2012 in San Francisco, California. (Photo by Stuart Franklin/Getty Images)