Evaluating the manager of an MLB team is a difficult task. Of course watching the team every day, and seeing how the manager handles various situations we can get a sense or feeling of how he is doing. But it’s almost impossible for us to separate our bias, whether it’s bias towards the individual or bias towards how we believe the game should be played and managed.
There are also many situations where we just don’t have enough visibility into the information necessary to judge the manager’s actions and the supposed advantages or disadvantages he has going for him.