The agent for Tiger Woods said in an email Monday that it's too early for doctors to decide whether the 14-time major champion can compete in the PGA Championship at Valhalla this week.

Woods withdrew from the Bridgestone Invitational Sunday after jarring his surgically-repaired back while playing a shot on the par-5 second hole. The Bridgestone Invitational was only his third tournament since returning from a three-month absence following back surgery in March.

Meanwhile, U.S. Ryder Cup captain Tom Watson says Woods' latest back injury "doesn't bode well right now" for him playing in the Ryder Cup. Watson told SiriusXM PGA Tour Radio he was watching the final round of the Bridgestone Invitational when Woods withdrew after hitting his tee shot on the ninth hole.

Watson has said a healthy Woods would be a good addition to the team, and that he hopes the former World No. 1 can play in this week's PGA Championship.