Too bad, his height made him an interesting player. I remember seeing that injury though, and boy was it ugly. Truly one of those replays I would have been better off not seeing. Knee caps aren't supposed to look like that.
I feel bad for him, maybe he'll figure it out overseas and be back in the NBA someday. Good luck.
I can't see the Celtics picking up any waived players unless its truly someone they can't pass on. Livingston doesn't fit that criteria.