In 2000, the Raiders head coach was Jon Gruden. He was traded to Tampa Bay and replaced by Bill Callahan, who was fired after two years. Norv Turner then took over for two years before he was fired. Oakland then brought back Art Shell for one season, before finding the team’s coach of the future with Lane Kiffin. That lasted just over a season; Tom Cable took over as interim head coach and was retained for the full-time gig for a couple of years. Then it was Hue Jackson, and then Dennis Allen, and now Jack Del Rio.
That’s 9 head coaching hires since 2000, the most in the NFL. The table below shows the number of head coaches (excluding interim coaches) for each team since 2000, the year Bill Belichick came to New England. There were 142 of them:
Over that time period, John Fox coached for the Panthers, Broncos, and Bears. Norv Turner was the head coach in Washington, Oakland, and San Diego, while also working as the offensive coordinator in San Diego, Miami, San Francisco, Cleveland, and Minnesota. In 2000, Mike Mularkey was the tight ends coach in Pittsburgh; in ’01 he was the Steelers offensive coordinator. He would become the Bills head coach in 2004, the Dolphins offensive coordinator and then tight ends coach, the Falcons offensive coordinator, the Jaguars head coach, the Titans tight ends coach, and now is the Titans head coach.
The Patriots aren’t the only team with impressive stability at head coach: Pittsburgh, Baltimore, and Green Bay have each also made just one coaching hire since 2000. And Cincinnati has its own unique situation. But it’s easy to take for granted how dominant Belichick has been for the Patriots since 2000, and data dumps like this help to remind me how much turnover there usually is for head coaches. On average, the other 31 teams have had 4.5 head coaches during this time frame.