The NFL coaching carousel is always an interesting one. More than any other league, NFL franchises get impatient with the work done by their head coaching hires, and they get the ax. Often, these coaches are given just a year or two to prove themselves. And if they don’t they’re gone. It’s just the cutthroat nature of the business.
That makes actually ranking the coaches on a league-wide scale somewhat hard to do. Every year, there are anywhere from 5-to-10 new guys taking the helm of their respective teams. And in a sport where continuity is key, that’s not ideal.