I felt tightness in my left Achilles warming up this morning, and it continued to get progressively worse. After hitting my tee shot at 12, I decided it was necessary to withdraw. In the past, I may have tried to continue to play, but this time, I decided to do what I thought was necessary.
I want to send my regrets to the World Golf Championships, Cadillac and the fans. The galleries were tremendous this week and I want to thank everyone for their support.
I will get my Achilles evaluated sometime early next week.