He later said it was more dental than mental, releasing a statement that he couldn't concentrate because of a sore wisdom tooth.
Scoring conditions were good early in the first round of the PGA Tour's final major of the year, being played at Kiawah Island, South Carolina.
Tiger Woods isn't the favorite to win the Masters 2011. That honor falls to Phil Mickelson. In fact, Tiger Woods may have peaked professionally. This week's Masters golf tournament may be the most critical test of Woods' golf career.