Wagner is a whiny ass. If there is any concern that Papelbon's fragile ego will be bruised by another "closer" arriving, that will be the least of the gristle that Wagner will add to that pen, or the locker room in general. He's already bitching for concessions. The Met's could have held him until the end of the season and just not exercised their option on him. The fact that they felt they had to see if they could jettison him now, gimpy arm and all, is a sign that they didn't want him in the locker room.
He was a punk with the Phillies, he was a punk with the Mets. Let him rot.