The other man to do it was Tony Sparano, who passed away unexpectedly yesterday. In one of the great turnarounds in NFL history, taking the 1-15 Dolphins from the worst record in football to AFC East champions in one season.

But even Sparano left Miami with a losing record. In fact, since 2001, Dave Wannstedt (31-26) and Todd Bowles (2-1 as interim head coach) are the only Dolphins coaches with winning records. Adam Gase (16-16) is the next most successful Miami head coach since 2001, followed by Nick Saban (15-17), Tony Sparano (29-32), Joe Philbin (24-28), and Cam Cameron (1-15). Along with Bowles, Dan Campbell (5-7) and Jim Bates (3-4) spent time as interim coaches in Miami.

The Bills have had 9 head coaches since 2001: Sean McDermott (9-7) has the only winning record, followed by Rex Ryan (15-16), Doug Marrone (15-17), Mike Mularkey (14-18), Dick Jauron (24-33), Gregg Williams (17-31), and Chan Gailey (16-32); Perry Fewell (3-4) and Anthony Lynn (0-1) also spent time as interim head coaches.

Meanwhile, the Jets — who had six different head coaches from 1993 to 2001 — have been the second most stable AFC East team since 2001. New York has had only four head coaches, but none of them have had winning records: Herm Edwards (39-41) and Eric Mangini (23-25) were both two games under .500, Rex Ryan (46-50) had a winning record until his final season, and current head coach Todd Bowles (20-28) has the worst record of the bunch.

Over the last 17 years, Bill Belichick is 209-63, making him by far the most successful head coach of this era. When it comes to regular season success, Tony Dungy with the Colts (85-27) is the next most successful, and after that, there’s another long dropoff in quality.

I looked at every head coach since 2001, and added 40 games of .500 play to each coach’s record with each team. This helps smooth out sorting by raw winning percentage, which would otherwise be biased by coaches who had great records over short stints. The table below shows the most successful head coach for each team since 2001. Here’s how to ead it, using the Broncos as an example. Denver’s best coach since 2001 was John Fox, who went 46-18 as the team’s head coach. If you add 20 wins and 20 losses to Fox’s record, he would have an Adjusted Winning Percentage of 0.635, the third-best since 2001 behind Belichick and Dungy. His actual winning percentage was 0.719. Denver has had 5 head coaches since 2001, and the Broncos as a team have won 58.1% of their games since 2001.

Only the Browns, Texans, and Jets have failed to have a coach with a winning record since 2001. For Cleveland, there’s been no successful coach: Robiski gets listed here because of his short stint, so adding 40 games of .500 play makes him look good! Butch Davis (24-35) is probably the actual best coach of the Browns since ’01.

The Jets, Dolphins, and Bills are all in the bottom 10 since ’01 in terms of most successful coach, and Miami and Buffalo are two of the seven teams with six or more head coaches since 2001. So yeah, it’s been rough for the three AFC East teams not in Foxboro for the last 17 years.

The last time that Buffalo was alone in first place in the AFC East was after week 2 of the 2014 season, when the Bills were 2-0 and the rest of the division was 1-1. Before that, the last time was week 3 of 2011, and other than a few weeks during 2008 (the year Miami won the division and Matt Cassel started 15 games for New England), the only other times since 2001 were after the first two weeks of the 2003 season.

For the Jets, it’s been even longer. New York was last alone in first place in the division after week 6 of the 2010 season, when the Jets were 5-1 and the Patriots were 4-1 (a week later, both teams were 5-1). Since 2002, the only times the Jets have been alone in first place were weeks 11-13 of the 2008 season, weeks 2 and 3 of the 2009 season, and weeks 5 and 6 of the 2010 season.

Looking ahead to week 2, the Bills travel to Carolina while the Jets head to Oakland. So there’s a very good chance the winner of the Jets/Bills game will be 1-1 next week, and New England (playing in New Orleans) will either be 1-1 or 0-2. That would allow the Dolphins, with a win over the Chargers in the first NFL regular season game at the StubHub Center, to be alone in first place in the division. The last time that happened? Week 2 of the 2010 season, and before that, week 4 of the 2005 season! Yes, there has been exactly one week in the last 11 years where Miami was alone in first place (in 2008, the Dolphins never achieved that status, despite winning the division on a tiebreaker).

The graph below shows how many games above .500 each team in the AFC East after each week of the NFL season for the 2001 through 2016 seasons. The Bills and the Patriots share blue and red as their primary colors, but that’s not a huge issue in this chart.

Here’s a remarkable note: the Patriots have at least shared first place in the AFC East in every week since week 2 of the 2014 season. And the last time the Patriots did not at least share first place in the division after week 3 of a season was back in 2010.