His thumb has been giving him jip for a while now. They were talking about it during the Quail Hollow tournament. Apparently he's having surgery on it, as he has had problems, causing his other wrist etc to overcompensate and now they are starting to give him trouble too.
sawgrass is a cracking course with some pretty interesting and score busting holes. will be interesting to see what Tiger scores. Just been reading about it on golf.com and he's not had much luck with practice this week.