The Redskins traditionally don’t like to work the running backs too hard who are likely to make the final roster so Clinton Portis and LaDell Betts probably won’t play much in the preseason .  So Marcus Mason is making the most of his chance to make the Redskins this year.  He leads the Redskins with a very impressive 178 yards rushing on 34 carries (5.2 ypc) and he has also caught 3 passes for 21 yards (7.0 avg) with a TD grab.  Mason also has been working hard on special teams as he has returned 2 kickoffs for 54 yards (27.0 avg).  The Redskins should really consider carrying a 4th running back this season behind Clinton Portis, LaDell Betts and Rock Cartwright because they won’t be able to hide Mason on the practice squad with the way he has been playing this preseason.