This might be a good start, but it won't solve the problem:
In the wake of the disappointing end to New York's season, Yankees general manager Brian Cashman has fired pitching coach Dave Eiland.
Here's a better answer: Hire a 400 pound, ex-NFL guy as the bench coach. When Girardi indicates that he's about to make a pitching change, have the 400 pound guy sit on him for 5 minutes. Given Girardi's constant - and mostly stupid - pitching moves - that woiuld help a lot.