"He made a couple uncharacteristic shots; the drive on 3 kind of was the first one," Guthrie said of Woods' day. "I didn't know if he wasn't feeling the greatest and kind of seemed like he might have been protecting, came up and out of it. I didn't think much of it until, I forget maybe 11, I noticed he was bending down gingerly.
"... If you're hurting, you're hurting. You don't need to risk injuring yourself even more. He's had his share of problems with injuries. There's no reason for him to chance it if he's really hurting."
Woods had dealt with a slew of injuries in recent years. He had major knee surgery following his 2008 U.S. Open victory. He has withdrawn from the Players Championship in both 2010 and 2011, the latter of which was an Achilles and knee problem that kept him out of two major championships. In 2012 at the WGC-Doral tournament, he withdrew after 12 holes of the final round for precautionary reasons concerning the Achilles; he won two weeks later at the Arnold Palmer Invitational.
Last year, Woods suffered an elbow injury during the first round of the U.S. Open at Merion. It caused him to miss the AT&T National, a tournament that supports the Tiger Woods Foundation. He was also expected to play the Greenbrier Classic but skipped, not making his next start until the Open Championship, where he tied for sixth.
This is the seventh time in Woods' career that he has withdrawn from a tournament, and the fourth in the last five years.