Tiger Woods withdrew Tuesday from Arnold Palmer Invitational because of pain in his back.

"I personally called Arnold today to tell him that, sadly, I won't be able to play in his tournament this year," Woods said on his website.

"I would like to express my regrets to the Orlando fans, the volunteers, the tournament staff and the sponsors for having to miss the event. Unfortunately, my back spasms and the pain haven't subsided."

Tiger Woods won his career Grand Slam at the age of 25. Having not skipped any of The Masters, he is now wondering if he can play in the game's biggest championships due to his persistent back ache.

Woods said he hasn¡¯t made any decisions about The Masters, and he is seeking further medical treatment.

"It's too early to know about the Masters, and I will continue to be evaluated and work closely with my doctors. I feel badly that I won't be able to play in this great tournament this week," he added.