It isn’t the best policy to fire folks on the fly once a season is under way. It is, in truth, an indictment that no matter how carefully planned a season might be, how meticulously blueprinted it was, something has gone wrong. That’s never a good thing.
Logically, rationally, we know there is no such thing as a magic bullet when it comes to these things so, logically and rationally, we know if the Mets were to, say, fire Mickey Callaway midway through this season it really shouldn’t matter much. Bad teams are generally going to be bad.