At the time I was livid and posted accordingly when the organization pulled Houck. But not because he had a perfect game (no one is going nine, especially a rookie on three days rest), but because he had been perfect, and we all knew the alternative was an imperfect bullpen.
Houck could've thrown one more frame and dispatched of the scheduled 7-8-9 batters. But then his pitch count might be up another 10 or 12, and limit his usage out in relief on Monday or Tuesday. I'm sure all possibilities were being considered, but as we're all aware, it's hard to look ahead to another game when we can't even look ahead to who can get batters out in the 7th, 8th or 9th.