That doesn't even make sense. Good managers can make bad calls, it happens.
A bad mistake is a bad mistake regardless of who makes it. And just because it works out does not mean it was put together with a solid thought process.
We'll probably have to agree to disagree on this. You have to go with your secondary guys when you give top guys the day off.
Davey Johnson gave Sean Burnett the day off (according to Adam Berry/MLB.com) and he went with the guy he thought had the best ability to get through the inning, which he decided was Gonzalez. I'll admit, I think I may have gone with Stammen.