The Tampa Bay Buccaneers will probably have to finish the game without Lavonte David, who suffered a concussion against the Detroit Lions. He was hit in the back of the head by a Calvin Johnson knee at the end of the third quarter and had to be taken to the locker room for evaluation after looking shaken up on the field, after which he was ruled out for the rest of the game.
His absence this game won't matter much at this point: the Bucs are down 27-10 and unlikely to actually score, let alone win -- their offense simply hasn't been able to move the ball enough. But concussions are bad, and David will have to complete a concussion test to get back on the field in future weeks, too.
If David can't go next week, he'll once again be replaced by Danny Lansanah, who's had to start in his place twice this year and has done well in that role. That would move Mason Foster back to his middle linebacker role, which is where Lansanah is this week thanks to a Foster injury.