The Buffalo Bills have signed starting safety Aaron Williams to a four-year contract extension. The move was announced Wednesday, and provides the Bills at least some long-term stability in their defensive backfield. Williams' signing came at a time when Buffalo stands to lose starting safety Jairus Byrd, who is preparing to test free agency next week. Williams was Buffalo's second-round pick in the 2011 draft, and is entering the final year of his contract. More...