It’s the third preseason game for the Dallas Cowboys, and that generally means the “dress rehearsal” where the starters see extended time. Will the Cowboys follow the tradition this time around? With the recent injury to Zack Martin and the diagnosis of Guillain-Barre Syndrome for Travis Frederick, Cowboys fans are feeling anxious about their offensive line. Fortunately Martin should be back for the season-opener but won’t be playing in this game, and nobody really knows how long Frederick will be out. Will the Cowboys hold back Dak Prescott and Ezekiel Elliott with the middle of their line missing?