The NBA is a general manager’s (or other titles that all do the same thing) league. More stats, more money, more decisions on team building come from upstairs, while most head coaches simply make the pieces work. Joe Dumars seemed to be on the path to greatness through the early years of his tenure with the Detroit Pistons, but the failures and bad choices he’s made since building that championship team have finally caught up with him, costing him his job.