Yeah, most people seem to think he's done with either an MCL or ACL, I'm not good with medical stuff, but it sounds like if it's MCL, there is a small chance he could be back later this year, though, he might not be 100% then. Though all depends on how bad it is as well.
Feel very bad for the guy... especially since people talk so much trash about him, since he was playing hurt when Mike McCarthy decided to pass the ball 67+% of the time, and the entire defensive game planned on how to attack the pass, which included avoiding avoiding either Bak or Bulaga (forcing them to go wide) and then attacking the OGs. But that was more Mam's fault for getting into a obvious pattern of passing it too often.
Sorta on a realistic financial side of things, he might be cheap to resign now... though can you trust him to get through a season?