Leadership: Some of the items Seth raised tie into it, but I'm thinking of something a little hard to describe - just that "it" quality that you see in a leader and immediately recognize. More than just charisma although that is usually part of it. Even without a job title, he's the guy people always came to. Intelligence: I don't mean book-larnin', of course, but the ability to rapidly synthesize information coming from all angles and turn it into a plan of action in the moment - both big-picture strategy and small-detail tactics. Baseball IQ is probably another term for it, which Molitor was reputed to have in spades and is necessary for the job. Baseball IQ can sometimes be replaced by just tons of experience so that the manager has seen it all before; but even by age 35, some minor league lifers will have seen an awful lot and if they have the intelligence they will have a vast database in their head to work from. Heart: the ability not to get rattled under pressure. This is hard to demonstrate, until the moment comes. So the people deciding whom to hire will have to infer. Humanity: You've got 25 human beings on your active roster, and the decisions you make as manager have to be cold-blooded in terms of what's best for the organization while never losing sight that the players aren't just the numbers on their baseball cards. Toughness: Some players will pose an unsolvable challenge and yet must be dealt with. This overlaps with decisiveness so I won't open a separate bullet item for that. Results: Our new manager doesn't necessarily have to have prior experience in the role, but should have a track record of finding answers.