The Buffalo Bills continue to counter the firepower in the AFC East (mostly that of the New England Patriots) by bolstering their pass rush.

The Bills had already signed Mario Williams to a blockbuster deal in free agency, and now have agreed to a four-year deal with former Patriots defensive end Mark Anderson, says Adam Schefter of ESPN.com on Twitter..

The combination of Anderson, Williams along with defensive tackles Marcel Dareus and Kyle Williams gives Buffalo a potentially formidable front four this season.

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Terry McCormick covers the Titans for TitanInsider.com