STFU.
First off, this is his agent talking so it could be exaggerated. Also, he knows he's too good not to be playing every week, and knows Evra is first choice LB, so its understandable.
But I think Silvestre should be sold, and then Heinze kept and he will probably still play at least 25 games, though it may not be enough. I just hope he doesn't go to Liverpool if he does leave.