Head coaching grades for all 32 current HC's

[Shake n Blake]

A few years ago - in response to a certain poster who claimed that Marvin Lewis was one of the most successful coaches - I created a grading system to compare Marv's entire tenure to how the rest of the teams fared over the same stretch. I graded each season and added all the points together. The grading system looked like this:

+8 points for 12-16 regular season wins
+5 points for 10-11 wins
+3 for a 9-7 season
0 points for 8-8
-3 for a 7-9 season
-5 for 5-6 wins
-8 for 4 or fewer wins

I added the following bonuses:

+10 for a division title
+10 for each playoff win
+50 for a Super Bowl title

For example, Marv accumulated +18 points last season without winning a playoff game. A 9-7 team that fails to win it's division, but wins 1 playoff game would accumulate a +13 score. Championship teams usually rack up a +85 score or higher. Not a perfect system, but IMO it's fair. Obviously if you make a deep playoff run or win a title, you should be heavily rewarded. You can also rack up points by winning in regular season and capturing division titles.

This time around, I figured I'd finally take Berserker's advice, and make it more of a coach to coach comparison. In order to do this, I graded every single season by every single current Head Coach. Fortunately, Pro Football Reference has all the information I needed on each coach's page, as it made accumulating the grades go much faster. In order to make the grades fair for comparison, I took each coach's total career points and divided them by total years coached. So the following grades are a per season average:

1. Bill Belichick: +28.9 (21 seasons with Browns, Pats)
2. John Harbaugh: +23.6 (8 seasons)
3. Mike McCarthy: +20.9 (10 seasons)
4. Mike Tomlin: +20.2 (9 seasons)
5. Chuck Pagano: +20.0 (3 seasons)
6. Pete Carroll: +19.3 (10 seasons with Jets, Pats, Seahawks)
7. Sean Payton: +16.9 (9 seasons)
8. Gary Kubiak: +14.0 (9 seasons with Texans, Broncos)
9. Bruce Arians: +13.3 (4 seasons with Colts, Cardinals)
10. Ron Rivera: +13.0 (5 seasons)
11. Andy Reid: +12.8 (17 seasons with Eagles, Chiefs)
12. John Fox: +11.4 (14 seasons with Panthers, Broncos, Bears)
13. Jim Caldwell: +9.4 (5 seasons with Colts, Lions)
14. Bill O'Brien: +8.0 (2 seasons)
15. Mike Zimmer: +6.0 (2 seasons)
t16. Rex Ryan: +5.0 (7 seasons with Jets, Bills)
t16. Chip Kelly: +5.0 (3 seasons with Eagles)
t16. Todd Bowles: +5.0 (1 season)
19. Jeff Fisher: +4.2 (20 seasons with Titans, Rams)
20. Marvin Lewis: +4.1 (13 seasons)
21. Jason Garrett: +4.0 (5 seasons)
22. Mike McCoy: +2.7 (3 seasons)
23. Jay Gruden: +2.5 (2 seasons)
24. Jack Del Rio: +1.1 (12 seasons with Jags, Raiders)
t25. Hue Jackson: 0.0 (1 season)
t25. Dan Quinn: 0.0 (1 season)
t27. Adam Gase (no experience)
t27. Ben McAdoo (no experience)
t27. Doug Pederson (no experience)
t27. Dirk Koetter (no experience)
31. Mike Mularky: -3.3 (3 seasons with Bills, Jags)
32. Gus Bradley: -7 (3 seasons)

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Notes:

- This is not a ranking of who is the better coach, it's only meant to judge past success.
- I gave Arians credit for the 2012 Colts, when he coached 12 games with Pagano out.
- keep in mind that Marv's first 8 seasons featured as many 4 win seasons as playoff berths. That hurt his grade, but it happened.
- Obviously, this years results are not included.