they can be shopped, and honestly if the right deal, for the right team (according to said player with trade clauses) comes along, there are ways to move those players...
The caveat is that we'll have to move them to either a contending team, or a team that is basically one offseason or trade deadline away from contending. For instance, I don't see them sending Staal to Toronto--at least not for the next year or two... On the other hand, I see no reason why Girardi couldn't be traded to Anaheim or Dallas...
Again, I'm speaking in a vacuum here--I'm not saying these players would accept these trades definitively, or if these teams would even be interested in these players... Just trying to prove a point about contending teams vs playoff teams vs non-playoff teams