Woods, who is seeking a second straight title at this event, hyperextended his knee during a collision with a fan while walking off the 18th green after a practice round on Wednesday. The injury occurred when Woods stepped on the fan's ankle.
The world's top-ranked player tried to swing on Wednesday, but couldn't. Woods then said that odds were high that he would be forced to withdraw.
He then showed up on Thursday an hour before tee time and showed little effects of the injury, as he birdied the opening hole.
A year ago Woods came from seven strokes back with seven holes remaining in the last round to beat rookie Matt Gogel by two strokes. Four months later, he won won the U.S. Open at Pebble Beach by a record breaking 15 strokes.
The 25-year-old Woods teed off at his schedule 8:50am PT starting time. He is playing the toughest of the three courses used at Pebble Beach -- Spyglass Hill. His is teaming up with pro-am partner Jerry Chang, a former Stanford teammate, and Florida neighbors Mark O'Meara and Ken Griffey Jr.
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