Managers are supposed to be the core of a baseball team. They're there to guide, advise, support and lead their team all the way to postseason dominance.
There are different styles of managing, but there are those managers who are downright mean. It is one thing to be critical and to try to make a team better, but there is a proper way to do that without crushing the spirit of the team.
Mean managers are often times highly successful as well, so it is really difficult to judge if meanness is a desirable trait.
With these thoughts in mind, here are the 15 meanest managers in MLB history in no particular order.