McGehee certainly seems to be a well-liked player, so there is some chance that his teammates would be upset if he were replaced. On the flip side, I'm sure everyone in the locker room know that Casey's not playing well, so there may be some players who are upset that he's not sitting more often. We will never know that, and as danzig said, "managing the egos" is a difficult thing and something to which the fans aren't privy. I've always been a proponent of starting Green slowly in some sort of a "soft platoon." I can't imagine the team would be in an uproar if Green got two starts a week for the struggling McGehee, as this is MLB baseball, and very few players deserve the "must play everyday" status. If Green gets a couple starts a week and plays well, helping the team to win, then I would guess that many of the other players would be glad Green is playing well. Really, this has seemed obvious for quite a while. In a soft platoon, if one of the players plays really well, then that player gets more playing time. If they both play well, then that's really great. If they both bomb, then we aren't any worse off than we would've been anyway. I think today would be an ideal time to start Green, as it's a day game, and he's riding high after getting his first MLB hit last night.