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Like many great passing teams, the Chargers like to use three to four wide receiver sets, which, in turn, forces defenses to pull a linebacker and insert another cornerback to cover one of the extra receivers.
Throughout this season and last, D.J. Moore has been the Bears' extra cornerback, otherwise known as the nickelback. Moore has been known for his ability to pick off passes (seven career interceptions) and his ability to get pressure on the quarterback when used in a blitz package.
But, this past Wednesday, Moore injured his ankle in practice and is not expected to play Sunday.
Enter, Corey Graham.
Graham is no stranger to the Bears defense, having started 10 games since 2007, but has had most of his success as a special teams player. Graham will be expected to play the nickelback position Sunday, despite being more experienced playing the number one, or number two cornerback position.
Graham is known as a strong tackler who plays well in the run game, but lacks some of the speed and agility that most nickelbacks possess.
Look for the Chargers to try to exploit Graham's lack of speed, and if that happens, the Bears may be forced to try Zachary Bowman in the nickelback spot.