The Ravens play the Bengals today so they should improve to 8-4. A Steelers loss would put them in a tie. On other hand, a win helps the Steelers keep pace with the Jets for the #2 seed and a potential first-round bye in the playoffs.
Here are the keys to the game for the Steelers according to the Sporting News:
Prediction: Steelers 14, Patriots 131. Roll Cassel. As he has developed, so has his team's reliance on him to make the offense look as productive as it was last season. Cassel has attempted 94 passes the past two games and thrown for over 400 yards in each, looking a lot like Tom Brady in the process. Shut him down, and the rest of the offense is tame.
2. Boss Moss. The Steelers have done a wonderful job of shutting down just about every top receiver in the league, everyone from Plaxico Burress to Santana Moss to T.J. Houshmandzadeh. And they just don't allow big pass plays. The longest pass against them this season is 65 yards, and that came on a deflection that should have been an interception.
3. Attack deep. The Patriots have had problems applying pressure on the quarterback, although most teams -- aside from the Bengals -- do not seem to have that problem against the Steelers. Roethlisberger should be able to make big plays against a weak Patriots secondary, if he gets the time.

