Rory McIlroy withdrew from the third round of the Arnold Palmer Invitational on Saturday when he felt muscle spasms in his back that were not going away. The spasms were not thought be to serious enough to keep him out of The Players Championship next week where McIlroy is the defending champion.

Rory McIlroy arrived at TPC Sawgrass shortly before 2:30 p.m. Wednesday and after some practice pronounced himself as “probably a game-time decision” to defend his Players Championship title.