back injury

Woods confesses his back started bugging him during 2012 Ryder Cup, and was reason for sitting out Saturday morning.

Golf injuries more common than in the likes of rugby and hockey.

Rory McIlroy's MRI scan reveals no new injury, but he'll decide early next week whether to play at Wentworth. 

"She's like 'Why? Are you not happy with me? What's going on?"

Mark Steinberg says Tiger Woods withdraws due to a lower back spasm.