Here's a look at a key matchup heading into Sunday's Week Nine game between the Bears and Bills.

Bears QB Jay Cutler vs. the Bills' secondary

The Bills are ranked dead last in the league in run defense, which would lead most offensive coordinators to emphasize the rushing attack when they play Buffalo.

Mike Martz isn't like most offensive coordinators, though.

Even if the Bears do run the ball more frequently in Week Nine, we know QB Jay Cutler is not going to spend all his time taking a backseat. Not in Martz's pass-heavy offense.

The Bills have only one interception this season, but part of the reason for that is that teams haven't thrown the ball much against them. Buffalo is tied with Dallas for the fewest passing attempts against (193) and the secondary is one of the team's strengths.

The last time we saw Cutler, he was being picked off four times in the second half by Redskins CB DeAngelo Hall in a 17-14 loss in Week Seven. He has had a bye week to learn from that game and try to avoid a repeat performance.

It doesn't sound like Cutler is overlooking Buffalo, despite its 0-7 record and 29th-ranked defense, but he has to be more careful with the ball. FS Jairus Byrd, who had nine picks last season, and other Bills defensive backs have the ability to make a play if Cutler continues to make poor decisions with his throws.