Buffalo Bills defensive end Greg Rousseau agreed to terms on a four-year contract extension Saturday.Financial terms were not disclosed by the team, however multiple media outlets reported that the deal totals $80 million and includes $54 million in guaranteed money.Rousseau, 24, is now under contract through the 2029 season.The news comes one day after the Bills signed linebacker Terrel Bernard to a four-year deal worth a reported $50 million and $25.2 million guaranteed.