Posada was tossed in the eighth inning of the Yankees' 4-3 win while pinch-hitting for Francisco Cervelli. If Moeller hadn't been on the roster, Girardi would have been forced to use emergency catcher Ramiro Pena behind the plate and find someone else to play third base.
All that said, Girardi doesn't have a problem with the emotion Posada brings to the ballpark.
"Jorgie is an emotional guy, and that's one of the things we love so much about Jorgie, because he brings that intensity every day," Girardi said. "Sometimes with all that great intensity he brings to the field every day, sometimes things happen. But I don't want him to change what he's doing most of the time, because his personality is important to this club."
Girardi added that, had Moeller not been on the roster, Posada "probably" would have been smart enough to avoid an ejection.
"I talk about it with all our players in situations," Girardi said. "You've got to be smart. We can't afford to lose you. Suspensions don't do us any good."