Sabathia was one bad pitch away from letting the Yankees blow the game open (if I recall correctly, he loaded the bases with one out and got two huge outs in the fifth). Carmona did a much better job at shutting down the Yankees than Sabathia did, and if CC starts Game 5, I think that Wedge is pretty much conceding the series.
Sabathia on three days' rest sounds like a better idea.