The Dallas Cowboys addressed the vacant roster spots left by Terrance Mitchell and Brandon McGee, who were released last Friday by signing two defensive backs today. No, it isn't Brandon Boykin who worked out for the Cowboys earlier, but it does add depth to the Cowboys secondary. According to Rob Phillips via twitter, the Cowboys decided to sign veteran cornerbacks Isaiah Frey and Dax Swanson. Isaiah Frey was a sixth round draft pick by the Chicago Bears in the 2012 NFL Draft. He played his college ball at Nevada.