Because he was not instrumental in said SB? It must have been very painful for him to watch the playoff run made by his team culminating in the SB victory. Boss had a nice stretch and though I'd expect know one to speak publicly, I'd have to believe he's looked at as expendable. Afterall, he was not needed to win a championship, right?
If the right offer came around, I think the Gints pull the trigger. With his injury history, I don't think it would cost all that much to get him, IMO.
I'm not saying we'd make a play for him, or that he's even worth dealing for/with, but it could be done.