The Redskins return the same starting offensive line they had last season .
Bill Callahan , the Redskins ' offensive - line coach , is encouraged by the improvement he 's seen in his players during preseason .
The Redskins return the same starting offensive line Redskins had last season .
Bill Callahan , the Redskins ' offensive - line coach , is encouraged by the improvement he 's seen in his players during preseason .