1 Joe Flacco gets back on track. The Lions have the NFL's worst pass defense, giving up 300 passing yards in seven of 12 games this season (and to the likes of Washington's Jason Campbell and Cleveland's Brady Quinn).
2 Ravens keep their focus. The Ravens have resisted overlooking the NFL's downtrodden recently, something they have to continue Sunday. Under coach John Harbaugh, they have won seven of eight games in which they were favored by at least seven points.