There was a time not so long ago when the Dallas Cowboys had two of the best coordinators in the game as Dan Quinn and Kellen Moore were leading their respective units. Both coordinators finished in the top five in points scored/allowed in each of their last two seasons with the Cowboys. Not too shabby.
But in 16 short months, both those guys are gone. The Cowboys have replaced them with coordinators who have a lot more experience. They hired Brian Schottenheimer last year to replace Moore on offense and Mike Zimmer this year to replace Quinn on defense.