The Buffalo Bills have agreed to a deal with defensive end Mario Williams, a source told ESPN senior NFL analyst Chris Mortensen.
A source told ESPN NFL Insider Adam Schefter that Williams agreed to a six-year contract. Schefter has since tweeted that the deal is worth up to $100m with $50m guaranteed.
The Bills have identified improving their pass rush as a top offseason priority after managing just 29 sacks -- including 10 in one game -- last season.
Listed at 6-foot-6 and 285 pounds, Mario Williams is a two-time Pro Bowl starter, who had a Texans' franchise-best 53 career sacks, including a team single-season best 14 in 2007. Williams was limited to playing just five games last season as a result of a torn chest muscle. He also missed three games in 2010 after having surgery to repair a sports hernia.
Aside from possibly Manning, Mario Williams was the biggest impact player available in free agency. Only 27, Williams will be an impact player on the Bills defensive line for years to come. Along with Kyle Williams and 2011 first-round pick Marcell Dareus, Williams makes the Bills defensive line one to be feared in the AFC East.