Just listened to a podcast of the Jim Zorn Show, heard on ESPN 980. As to the final roster, Zorn says 10-12 spots are open, mainly among backup O-linemen, D-line, LBs, and receivers. In addition, he said that the running back situation is "cloudy". Says that some of the guys who are cut probably will play somewhere in the league, but just weren't part of their plans.
Now, take this for what it's worth, but one of the beat reporters who covers the Redskins for the station, Frank Hanrahan, said that Rock Cartwright could very well be a surprise cut. In part because he's been openly critical over his pay, and that he's starting to rub some of the coaches the wrong way. One reporter's conjecture, I know. But it does lead into Zorn's comments about the RB spots being "cloudy."
Personally, I haven't seen enough from Mason, Aldridge or Dorsey that makes me think either of them have supplanted Rock Cartwright. But think of it this way: What kind of message would it send to the players when a six-year veteran, a "locker room leader" gets kicked to the curb? To me, it would send a message that no one is safe, that they all had best be on their game. We'll find out on Saturday.
You can listen to the interview
here.