As we all know, injuries happen (see Cs playoffs last year). Of course he is expendable, but the roster is bigger than 8-9 slots for a reason. JJ likely won't play a whole lot this year unless a barrage of injuries is unleashed on our team, but, like Zeller (note, I like him more than Zeller), he fits in well with the team, as a whole, and is always ready when called upon. His contract is/has also been very beneficial - not much else you can ask for.