The Chargers signed cornerback Nathan Vasher to a two-year contract on Monday. Vasher is a five-year veteran, having spent all his previous seasons with the Bears. "In Nathan Vasher, we're adding a proven NFL player with experience in the league," said general manager A.J. Smith. "Having played in Chicago under Chargers Defensive Coordinator Ron Rivera (2004-06) and Secondary Coach Steve Wilks (2006-08) is an added bonus."