One area where the Bears have really struggled this season is in the passing game.
They don't have the best group of receivers, and their best receiver, Brandon Marshall, is new to the team. When he and Cutler have been out of sync, the whole offense suffers.
Other than pressuring Cutler, taking away Marshall is the most important thing that they can do defensively. Cutler likes Marshall, and he likes throwing the ball deep.
If the Titans make their No. 1 priority taking away Cutler's passes to Marshall, they'll make Cutler take a little bit more time getting the ball out, since he likes looking to Marshall first.
Buying that little extra time could help the defensive line get to Cutler more often.
It's a case of "help me help you," more or less. The more pressure the defensive line gets, the easier it is for the defensive backs to cover, and vice-versa.
If both units do well, the Bears will stall offensively.