Well, he's sitting out right now with knee pain, and is likely to miss at least the opener.
I think that people would be dumb to think that there's NOTHING wrong with him. I believe he had PRP treatments in the offseason, so the reality is he likely has chronic patella tendenitis, which would be something he would have to deal with every year for the rest of his career....kinda like Utley.
So no, I don't think his career is over or that he's gonna be a bust from here on out...but he WILL be the type of player to miss time frequently, especially if he doesn't keep himself in shape in the offseason and keep strengthening and stretching that knee. That type of chronic injury is cyclical...sometimes the shyt hurts, sometimes it doesn't. And the offseason is usually when it doesn't.