13. Tom Cable
It’s often said that the way a team acts on the field is a reflection of their coach’s personality. We’re not just talking about tactics here, but also discipline. So if your coach breaks the jaw of one of his own assistants, then you can expect things to be volatile come game time. That’s exactly what Cable did.
His time as head coach of the Raiders was bleak. They posted back-to-back losing seasons before breaking even in the third. That’s not to say he’s a bad coach because he helped the Seahawks to the Super Bowl as an assistant. But his personality prevented him from making a positive impact in the top job.