According to an article on Fox Business, Tiger Woods and EA are going separate ways. No specific reason was given for the split. The last Tiger Woods PGA Tour game was released in March of this year, with a Metacritic score (Xbox 360) of 77.
Apparently the games still sell quite well, so I wonder what the reasons could be. Possibly, Tiger's name no longer carries as much clout as it once does, though his temporary lull in his golfing abilities has seemed to turn around. I guess this announcement means we'll never see Cyber Tiger 2 at this point, huh?