As bad as the Bengals are, the Ravens aren't nearly good enough to lay this big of a number in a division matchup. 
The Ravens' defense has surrendered 96 points in its last three games. They rank 29th in pass defense and are down several key members in their secondary, including Jimmy Smith and Tony Jefferson. It's become obvious how much Baltimore misses former defensive stalwarts Terrell Suggs and C.J. Mosley, both of whom departed via free agency. 
The Bengals have proven to be a feisty underdog covering five of the past six times in that role. They nearly beat Seattle and Buffalo straight-up on the road this season. Cincinnati is 4-1 ATS during its last five visits to Baltimore.
The Ravens have failed to cover in their last five games and are 1-6 ATS the past seven times they have been favored. Their heavy reliance on running the ball makes them an especially poor choice to lay double-digits.