McCarthy's play-calling will be vital to a Green Bay Super Bowl berth.

Despite a very strong showing from the Chicago Bears defense this season, there are certain areas that can be exploited by an offense like the Green Bay Packers.

In fact, the Bears defensive philosophy has a weakness by design. In their Tampa 2 style of defense, middle linebacker Brian Urlacher is vacating the usual spot of the middle linebacker to become a third safety and cover the middle of the field. Most teams try to attack this the same way they would attack a Cover 2 and send their tight ends and slot receivers down the seams.

But when they do that, Urlacher is usually running with the receiver step-for-step. So instead of attacking the Bears in the seams, the Packers would be better served running a plethora of underneath routes right into the middle of the field.

You know, the spot where Urlacher would be standing in a usual defense.

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