When Luke Scott returns then one of the 13 pitchers should go back to Durham, most likely Alexander Torres. Scott by the way STILL leads the team in RBIs and hasn't had but a few ABs in June when the back went. No Comparison whatsoever with Burrell, though this board appears to be focused on BA and BA only. Scott was doing his job well driving in runs in April and May.
I would expect that when Joyce comes back then Rhymes goes back down and Conrad stays, but that should depend of course on performance. Too low an offensive ceiling with Rhymes and unfortunately part of the defensive problem. I don't expect Conrad to change things much on defense but he can hit for power and drive in some runs.
I see Hideki Matsui staying even though he really hasn't got it going yet. I still think he gets good ABs but the balls just aren't falling in there. Two of our best left-handed hitters with back problems doesn't sound good (Joyce and Scott). Back problems aren't like stubbing your toe or something, they usually don't just heal up and poof go away. Therefore I see Matsui staying.
If Longoria or Fuld eventually return then there might be a few difficult roster choices but that will be down the road.