Three things that could go wrong ...

( Christian Petersen, Getty Images / December 19, 2011 )

1. WALLACE RUNS OUT OF TROUBLE. With starter Colt McCoy dealing with a concussion, Wallace is expected to make his second consecutive start and he does bring a new dimension to the Browns’ offense with his ability to get out of the pocket and make plays with his legs. The Ravens will bring the heat as they always do, but they are wary of Wallace’s speed and ability to make something out of nothing, which McCoy has been unable to do on a consistent basis.