Well, technically he never left, seeing as he's training the young goalies at Ajax right now...but he will return to play as a keeper for the first Ajax team. This because 2 of the 3 current goalies are injured for the immediate future, and the only healthy one is a young kid with not so much experience. (did a great job against Manchester yesterday though) A good thing if you ask me, couldn't understand why they didn't give Grim another year at it, seeing as he did great last season.. in my opinion.
Ajax had no choice due to the injury situation. Grim did OK last year but it would have been nice if Ajax had the money to get an international quality keeper.