Tiger Woods says it's unrealistic to project his unbeaten start to 2008 into a perfect golf season.

Woods has won six straight events and eight of his past nine dating back to last season. He isn't likely to return to the course until next month at Arnold Palmer's Bay Hill tournament in Orlando, Florida. When he does, he said, he'll be trying to continue his winning streak as far as it can run.

"I have been asked whether I think I can go undefeated this year," Woods said on his Web site. "Is it realistic? No. But why would you go to a tournament if you don't think you can win? That's my expectation of myself."

While a perfect season may be far-fetched, Woods said that he is playing the best golf of his career. In 2000, when he won a personal-record nine tournaments, he played in 20 events. In 2005, when he won eight times, he played in 15 events. Last year, he had seven wins in 16 tournaments.

"The point is, I'm playing in fewer events on the toughest courses against the best fields," he said. "That's why I feel my game has progressed and why I feel so good about all the hard work I have put in."