There's a growing sense among Eagles fans that the defensive scheme run by Jim Johnson is starting to get a little stale. Johnson's defenses of old used to attack, bewilder and disrupt opposing offenses. The last couple years they've mainly befuddled their own fans.
Local commentator Gary Cobb summed up the situation like this:
"The 2nd factor which kept the Eagles at the top of their league was the defense. Jim Johnson did a great job of keeping offenses off balance with his series of blitz packages, but they’ve caught up to him and his schemes. Rather than allow Johnson and the Birds to employ their tricky blitz schemes on third down, teams stay out of 3rd and long situations by throwing the ball on first or second down. The word is utilize a conservative game plan against the Eagles by running the ball and throwing short on first or 2nd down. The Johnson scheme has shown a weakness versus the run, to the point that teams are able to render the blitz schemes null and void, by pounding them on the ground. For years Jim Johnson's defenses kept team under 20 points but of late, the Eagles defense gets dominated and never seems to step up when the game is on the line. If it weren't for the late season heroics of Brian Dawkins, the Birds wouldn't have been any where near the playoffs in 2006."
My sense is many fans would agree with most, if not all, of what Cobb is saying. But let's look at some numbers first. Here are a couple graphs with some key defensive performance indicators over the last 10 years:
The first graph show sacks, interceptions and points (points scale on the right side). These are all key indicators for the health of the Johnson defense, which thrives on pressure and getting after the quarterback.
The second graph shows yardage figures, which don't fluctuate as much as one might expect, and certainly not as much as the point graph would seem to suggest they should.
The immediate observation is that the Eagles' defense is not as good as it used to be, at least in terms of points allowed. But this isn't a recent development. From 2000-2002, the Eagles had one of the best defenses in the league. Starting in 2003, however, it got significantly worse. I don't really like to include 2005 in all these things, just because it was such an anomalous season, so if you throw that one out you see that there are really two point plateaus here. The first from 2000-2002 and the second from 2003-2006.
The only interesting point I see in the second graph is a clearly identifiable trend over the past few years to give up fewer yards in the air, but more on the ground.
These real-world stats are validated by the hard-core work done by the guys at Football Outsiders. Every year, they put the entire season's worth of plays through their statistical sausage grinder to try to strip out variations between teams and provide a truly comparable look at each team's performance. This is what they've come up with for the Eagles (because it's defense, negative numbers are good):
| Year |
Defense DVOA |
Rank |
| 1998 |
6.7% |
26 |
| 1999 |
-15.3% |
7 |
| 2000 |
-12.0% |
8 |
| 2001 |
-21.5% |
1 |
| 2002 |
-13.8% |
4 |
| 2003 |
0.1% |
17 |
| 2004 |
-2.2% |
16 |
| 2005 |
-4.6% |
14 |
| 2006 |
-6.2% |
11 |
If you look at their numbers, you see the same thing. The Eagles were very good for a four-year stretch -- peaking in 2001 -- and since that time have been consistently pretty mediocre.
But check out what else is happening there. According to their numbers, the Eagles' D bottomed out in 2003. Since that time, when you control for opponent's strength and other factors, the Eagles defense has been steadily improving and reached a #11 ranking last year.
Taken together, all these trends don't suggest to me that the best explanation for the demise of the Eagles' D is that the league has finally caught up to Johnson. After all, if his pressure scheme no longer works, why aren't teams throwing with impunity against us? And why has the defense been improving over the last four years, rather than getting worse, as the "book" on Johnson supposedly makes the rounds? (The "catch up" side of the argument would have to explain why we just got around to noticing something that happened four years ago.)
I think the answer is pretty clear. And I don't think it's the coaching. Check out this comparison:
| 2001 |
2006 |
| LDE Brandon Whiting |
LDE Trent Cole |
| LDT Corey Simon |
LDT Mike Patterson |
| RDT Hollis Thomas |
RDT Darwin Walker |
| RDE Hugh Douglas |
RDE Darren Howard* |
| WILLMike Caldwell |
WILL Matt McCoy / Omar Gaither |
| MLB Jeremiah Trotter |
MLB Jeremiah Trotter |
| SAM Carlos Emmons |
SAM Dhani Jones |
| LCB Troy Vincent |
LCB Lito Sheppard* |
| RCB Bobby Taylor |
RCP Sheldon Brown* |
| NCB Al Harris |
NCB Rod Hood / Joselio Hansen |
| SS Damon Moore |
SS Michael Lewis / Sean Considine |
| FS Brian Dawkins |
FS Brian Dawkins |
For the 2001 team, I took the usual starting lineup from the team website. For the 2006 team, I went by memory (with the starred players being ones who experienced significant injuries).
I've gone through and bolded out the players I think had a clear advantage over their counterparts from the other team. You may not agree with all of my choices (maybe Trent Cole is better than even and Mike Patterson might be a wash), but even if we might quibble on a few, the trend is unmistakable.
The 2001 Eagles defense was simply far more talented than the 2006 Eagles defense.
It has nothing to do coaching or scheme. It has to do with the fact that the players simply weren't as good.
Too many times in the NFL, fans overestimate the impact of coaching, at least right away. Look at how long it took Tony Dungy to turn around (momentarily) the Colts' defense. Look at how long it took for Marvin Lewis to have an impact on the Bengals' fortunes.
In the NFL, coaching matters, but you win and lose with players. The good news is that this situation is starting to turn around. If you did a similar comparison chart between the '06 and '07 squads, this is what you'd see:
| 2006 |
2007 |
| LDE Trent Cole |
LDE Trent Cole |
| LDT Mike Patterson |
LDT Mike Patterson |
| RDT Darwin Walker |
RDT Brodrick Bunkley |
| RDE Darren Howard* |
RDE Jevon Kearse |
| WILL Matt McCoy / Omar Gaither |
WILL Takeo Spikes |
| MLB Jeremiah Trotter |
MLB Trotter / Gaither |
| SAM Dhani Jones |
SAM Chris Gocong |
| LCB Lito Sheppard* |
LCB Lito Sheppard |
| RCP Sheldon Brown* |
RCP Sheldon Brown / William James |
| NCB Rod Hood / Joselio Hansen |
NCB William James / Sheldon Brown |
| SS Michael Lewis / Sean Considine |
SS Sean Considine |
| FS Brian Dawkins |
FS Brian Dawkins |
So maybe don't be surprised when Jim Johnson suddenly "catches back up" to the rest of the league again this year.
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