His decision to withdraw is the first time he left an event early since the 2006 Nissan Open, when Woods pulled out of competition with the flu.
While the reports of exactly what happened are still coming in, the events that caused Tiger's decision to stop play happened on the 7th hole. The word is he hit a tee shot, grimaced in pain, went down to hit his second shot, left it 20 yards short of the green and then called over an official.
After chatting with the official, Woods walked over, picked up his ball and left the course. Tiger was 2-over par through six holes in his final round when he made the decision to withdraw.
While it is easy to speculate that Tiger was just ready to get done with a second disappointing tournament, we all know that Woods is the furthest thing from a quitter on the golf course. No matter if he is trying to win an event or just grind out another made cut, he is always pressing until the final putt drops.
Is the injury something to be worried about? Absolutely, because after what we saw at the 2008 U.S. Open, Woods plays through just about any and all pain.
This is just the third tournament Tiger has played since returning to golf, and it will be the second in a row that won't see Tiger finish all 72 holes.