I don't recall Gibbs, Williams, Snyder, Cerrato, or anyone else within the organization stating that the term "core redskins" is restricted to only 15 players on the team. When anyone can find anything supporting that theory, let me know.
As for what Clark wanted, he made it clear in the article mentioned earlier that he wanted to start. And I think he deserves that opportunity considering that he had to beat out Bowen, Stoutmire, Prioleau, and Andre Lott (a year ago) to get his role with the team. It's not like he was a liability or weakness in our secondary.
Someone mentioned that we don't know what his teammates think of him. Well, I do know that Gregg Williams has praised him on several occasions, and both Marcus Washington and Mike Sellers have also had good things to say about him.
I suggest that SOME of you do a little research on Clark before suggesting that he may not be liked by his teammates or that he hasn't stated what he wants. The articles over the past year from the Washington Post have made it abundantly clear where he stands.