Chargers sign QB Chase Rettig

The Chargers have added one quarterback and waived another, signing second-year pro Chase Rettig and parting ways with rookie Cole Stoudt, the club said Wednesday. The 23-year-old Rettig spent training camp and most of the preseason with the Packers in 2014 before being waived in August. He was a four-season starter at Boston College (2010-2013),…