I meant more that I didn't think it looked like a season ending injury. He was up and around and joking with Cousins on the sidelines after the Vikings TD.Didn’t look serious? He was on the ground either writhing in pain or crying. He then left cradling his arm and never got back into the game. Unless they determine that it was just a stinger, I’d say it absolutely looked serious.
Stinger is very possible, as is a shoulder sprain. I don't think he broke his collarbone or anything like that. Its encouraging he came back to the bench and wasn't in a sling or anything.
From a Vikings perspective, they can likely go 2-0 without him against the Lions and Chargers, they'll need him against Green Bay. Mattison has looked very solid in limited work, and they have good depth.