1) I guess Warren is inactive for the Miami game. Perhaps Warren will be back after that game.
2) I expect that Tarp will be active and have another injury. In any case, I don't understand what Belichick sees in Tarp. If we want to have a developmental OL on the 53, then our man is Edds.
3) Maybe Warren was in camp as insurance in case on of the FOUR acquistions didn't work out. We added Ellis, Haynsworth, Carter and Anderson. Perhaps Warren simply wasn't needed. Just maybe, we have enough defensive linemen without him on the 53-man roster.
4) Pryor is signed though 2012 and provides position flexibility. He is a perfect patriot, and has done very well. I was not surprise to see Pryor stay over Warren.
BOTTOM LINE
Warren is at the bottom of our DL depth chart.
The Tarp situation is not particulary relevant to Warren, although I would have preferred to see Tarp cut. Tarp has a special teams position instead of a 5th safety. If we sign a safety, Tarp or Ihedigbo should go (Belichick chosing between the special teamers). He could cut White, but White is needed for every game as one of our top special teamers.