Got it: http://www.packersnews.com/story/spo...g-do/92797420/

Its a little bit speculative though I think it fits with his performance.

Randall is believed to have suffered the injury during the Week 2 game at Minnesota. He wasn't on the injury report the following week but said after the victory over Detroit on Sept. 25, that he was "a little banged up."

He showed up on the injury report on the first day of practice after the bye and then dropped out of the New York Giants game. He tried to come back against Dallas, but lasted only 17 snaps before dropping to the ground in pain and exiting the game.