Well I can tell you with 100 percent certainty that I don't think he should be accountable for Milton Bradley being a complete nutjob, and yet that was your #1 go-to example of how he mismanaged the 2010 Padres. 

Black's W-L record as a manager is not very impressive, but I never felt he had a lot to work with in San Diego. I will grant you, however, that the Padres are no longer fading in September now that Black is no longer at the helm.