I believe Barr saw an opportunity to get a big hit on a QB and took it. Rodgers was out of the pocket so he was fair game. I don't know if Barr was trying to injure Rodgers but every defender on every team will take a legal shot on a QB, especially one as good as Rodgers is. If he can take the QB either out or off his game the chances of his team winning go up substantially. Don't be surprised if this kind of hit is addressed this offseason. The league doesn't like to see their marquis QBs out. Who - other than Packers and Lions fans - is gonna be eager to tune in to see a Hundley led Packers squad square off against Detroit on Monday night in a couple of weeks?