I re-watched the game and there was a play where he was pursuing the QB to the sideline and you could see at the end he was running awkwardly like he'd pulled a muscle. So my guess is the hamstring. Hopefully he'll be ready by Saturday.Watching the sidelines last night they were working on Brezina’s lower hamstring. Having him run and cut on sideline. He did come back in for around 1 play and then they shut him down. You could tell he wanted back in.