Is The Eagles Offensive Line Quietly Even Worse Than Last Year?

The Eagles rushing attack is pretty great.

The offense leads the league in total rushing yards (2140) and average per carry (5.0). Football Outsiders grades them out as the top DVOA rushing offense with +20.1%, head and shoulders above second-place Dallas at +10.9%. A piece of that action has come on quarterback runs. Michael Vick is second in the NFL in rushing DYAR despite having only played in parts of six games. Banged up at age 33, he has the highest rushing DVOA of his career, a ridiculous +68.1%. Even slowpoke Nick Foles places 7th in rushing DYAR and 9th in DVOA, showing the power of the zone read.

But the bulk of the rushing offense comes down to one man: LeSean McCoy. The first back to cross 1000 yards, he's second in the league in DYAR and has already surpassed his personal season rushing record. During the Snow Bowl, he set a new franchise single-game rushing record. However, he also took some flak last month from his coach Chip Kelly, who told the press that he pushes Shady to not dance around quite so much:

"I think LeSean is trying to press too much and trying to hit a home run on every play instead of letting it develop," Kelly said.

The comment was fairly innocuous, as any observer could point out a couple plays every game where McCoy tries to out-juke just one too many defenders, or cut back one too many times. But ultimately McCoy is a Barry Sanders-esque force of nature in the backfield, and he's bailing out Chip's offense and his blockers up front much more than the other way around.

See, the truth according to the advanced stats runs somewhat contrary to the conventional wisdom. Not that anyone is particularly discounting McCoy's contribution to the offense. But there has been a lot of praise heaped on the zone read and a rejuvenated offensive line for the success of the run game. It's not completely misplaced. Certainly we've seen the Jason Peters, Evan Mathis and Jason Kelce dominate blocks at times. Todd Herremans appears to be fading with age, and Lane Johnson makes some rookie mistakes, but they're important athletic pieces in the blocking scheme.

But ultimately, the advanced offensive line stats don't look particularly good:

Since 2010, when McCoy took over as the featured back, the rushing attack has been stellar. High per-rush averages, great power success (that's short yardage, high leverage plays), and elite 2nd level and open field gains. The consistency of those stats is shocking compared to the overall decline in Football Outsiders' signature stat of Adjusted Line Yards. That metric weights runs by distance, attempting to isolate the offensive line's performance over the early yards vs. the largely running back-driven yards down the field.

McCoy has always generated a healthy performance bump above what his offensive line provides him, but this year is the greatest difference yet. Some of that is a higher rushing average than the last two years, but Eagles running backs are actually behind their 2010 pace. The difference is that the offensive line has only "generated" 3.47 yards per rush, 0.6 yards per rush less than 2010. The gradual decline over the last three years comes despite no major change in power or stuffed rank. And the 2nd level and open field yards are as good as ever for McCoy.

Plus, the offensive line isn't doing so hot in pass protection either. The adjusted sack rate is actually worse than last year, despite a distinct lack of starting games by noted turnstile Danny Watkins.

None of these stats are perfect, but the overall picture isn't jiving with the public narrative of a rejuvenated offensive line. And that's partially to be expected. The Eagles had the eight-oldest starting offensive line coming into the season, despite starting a 23-year-old rookie. The Giants are the only other team to rely on three starters over 30. Normally you would worry about injuries with an aging offensive line, but due to either #sportscience or good luck, the Eagles front five have been remarkably injury-free. They just haven't been as productive.

Despite controlling their own playoff destiny, this team has a lot of obvious holes. But when everyone's screaming for more pass rushers and defensive backs this offseason, don't be surprised if the Eagles make a push for young offensive line help. It's secretly one of the team's largest problems.

How Chip Kelly Uses The Run To Post Near-Record 3rd Down Efficiency

Here's a stat you probably didn't know: this year's Eagles offense is on pace to register one of the smallest three-and-out percentages in recent history. Through six games, Football Outsiders clocks the Eagles as having three-and-outs on only 10.8% of all drives. If they can keep that pace up, it would tie them for second-best among all teams over the last 16 years (the entire period FO has accounted for this stat).

There are a number of things that help Chip Kelly's offense avoid the dreaded three-and-out. Part is just being tremendously efficient across the board. The historical team the Eagles are tied with right now is the 2001 St. Louis Rams, an offensive juggernaut that rode to a 14-2 record and Super Bowl appearance. Like those Rams, the 2013 Eagles rank second overall in offensive DVOA, with both passing and rushing offenses in the top 5. When you register a full 1.2 yards more per play than the average NFL offense, you're going to have fewer dead drives.

But that's not all. The number two ranked team in three-and-out percentage is the Carolina Panthers, and their offense is middling. There's another key to Kelly's success in this area, and it's relatively simple: he runs the ball more on third down and short.

On third down with 1 or 2 yards to go, NFL teams run just slightly more than they pass this year: 52%. This is odd, because running is significantly more effective. 66% of all runs from this distance convert a first down, while only 51% of passes do. Such odds would be even more favorable for the Eagles offense. The offensive line has looked good so far (although only 3.81 adjusted line yards), but more importantly LeSean McCoy is a beast. Kelly clearly knows this. He has called run plays in those situations 84% of the time, far more than any other team -- and has an 81% success rate to show for them.

The tendency extends to third downs from 3 to 5 yards out as well. For most NFL offenses, this is a straight passing down. A quarter of teams have yet to call a run in this situation, and the overall rush rate is a measly 10%. This seems to be a rational decision for most teams. At this run-pass ratio, the success rate for both has hit an equilibrium of about 47%.

Kelly, however, has called runs on 35% of these plays. That percentage is exceeded by only one other team: the Panthers, who we mentioned above. Both teams have succeeded with this strategy. The Panthers, with Cam Newton and a couple of successful backs, have been successful on 60% of their runs. The Eagles have converted a first down on over 70% of such plays.

This isn't new territory. Brian Burke wrote about how NFL teams should run more on third and short back in 2008:

On 3rd and 1, offenses scored an average of 2.38 points if they ran, and an average of 2.24 points if they passed. The difference of 0.14 points is remarkably close to the 0.12-point theoretical estimate calculated above.

The differences are even bigger for 3rd and 2 and 3rd and 3 situations. The advantage of running is 0.45 and 0.31 expected points respectively—convincing evidence that offenses should be running more often on 3rd and short.

With the numbers -- and an elite back -- to support him, Kelly's play calling has been spot on. The Eagles have converted 74% of all third downs from 1-5 yards. That's the highest rate in the league, and is a key factor keeping their up tempo drives rolling.

Game Rewind: 15 Screenshots From the First 15 Minutes of the Chip Kelly Era

On Monday, before the Eagles' opener, I downplayed the notion that the Eagles would be able to put many wins together this season, noting that what we're really looking for is a season like Andy Reid's foundation-building 1999. I WAS WRONG.

Well, at least I was wrong about the team's potential to win games this season. Looks like the offense Kelly brings may be good enough to be more competitive more quickly than I expected. Not to mention exciting. I'm riding high off that win, especially the first quarter that became one glorious offensive wet dream.

Still, I'd caution against reading too much into Monday's game. Not only was the offense new, the defense was also unexpectedly shifty. That's a positive development from their listless preseason performance, but as the game wore on Washington adapted to Billy Davis' schemes (and he backed off some). Some flaws were exposed and others soon will be by opposing coordinators now getting a fresh look at Eagles tape. Without the Redskins' early turnovers, the Eagles might not have gone home as happy.

Because the game turned out to be so long, and the coaches' tape isn't up yet, I only managed to re-watch the first 15 minutes of the game. Here are 15 screenshots from that giddy first quarter... (Click to embiggen)

Most of what I want to highlight are variations on the zone read play Kelly loves to call. Below is one where Vick appears to be reading the slot corner. When he stays home to guard against the bubble screen, McCoy gets the handoff up the middle. Also note, the blue block is Lane Johnson, firing up to the second level after lining up on the right next to Jason Peters. Freezing one defender and then running Shady behind two tackles like Johnson and Peters is frightening:

Similar play below. Again, Vick is reading the slot corner (#26). Washington had that corner come on the blitz a few times, including this one. Reading him is a perfect counter. Vick fakes the hand off and throws a quick bubble screen to DeSean:

Then the Eagles take the above concept and add another option for Vick -- a pop pass to the tight end over the middle. Now he's reading the middle linebacker London Fletcher (#59) in addition to freezing the rest of the right side of the defense via the bubble screen threat (which he may change to given pre-snap read). When Fletcher turns to pick up Brent Celek, Vick hands it off to McCoy:

Like any other running play, success is contingent on the men up front maintaining their blocks. But because of the passing options, by the time McCoy gets to the second level, there's no one there to meet him. London Fletcher, with four Pro Bowls, 15 years of experience, and over 1300 career tackles, has taken himself out of the play:

Later we see essentially the same play run to the right. This time, Fletcher takes a step forward, looking at McCoy. Vick throws to a wide-open Ertz instead, picking up an easy first down:

Below is another zone read where Vick is either reading the LB or the DT. I highlighted the former, but it depends who you think Celek is trying to block. Either way the threat of the QB keeper makes it devastating when he actually hands off to McCoy -- who follows a pulling Jason Kelce into a hole manned by the unbalanced line of Peters and Johnson on the right:

The Eagles didn't play much defense in the first quarter, but here's one play we can take a quick break for. The Redskins execute a great screen. They manage to get Alfred Morris the ball with three linemen poised to crush Mychal Kendricks and anyone else. But Kendricks, showing this may be a breakout season, dodges two of them and makes a textbook open field tackle:

One problem I kept noticing was Vick being indecisive on what should be quick reads. Here the pre-snap read is clearly going to indicate throwing the bubble screen right away. Only one of the three DBs to the bottom is within 10 yards of the line of scrimmage:

Vick should throw this ball immediately in the screenshot below. DeSean is open and Avant is just beginning to engage the first DB:

Instead, Vick holds on to the ball and sprints out. This brings pressure on himself and allows the safety to come down. But worst of all, he's letting Avant block downfield for a couple of seconds before the pass is thrown. The referees called an easy offensive pass interference on this one:

Vick also needs to make quicker decisions under pressure. Below he has a free rusher in his face and instead of dumping the ball off to an outlet receiver (or just throwing it at their feet), he freezes and takes a dumb sack:

Alright, now check out the play below. It's another zone read sweep where Vick is reading the defensive tackle. He sees the DT crash down, so he pulls the ball and runs upfield. Todd Herremans springs to the next level to block the linebacker, while Brent Celek (obscured) tries to cut block his man:

Some people speculated during the live game that Vick ran head first into the scrape-exchange. But really this is just a simple execution problem. Celek's cut block is awful but slows down his man. It's Herremans who totally whiffs on the linebacker, leaving Vick exposed. Note, Vick probably would have had better luck running to the sideline instead of cutting back inside:

One of Vick's sacks came when Herremans and Johnson had some kind of blocking miscommunication. Herremans blocked down on the defensive tackle while Johnson eyed the blitzing linebacker. Neither of them picked up Ryan Kerrigan:

Before even helping Vick up, the rookie turned to Herremans to hash things out:

The Herr-Dawg Prepares to Move Inside

Todd Herremans doesn't seem to mind his presumed move back to guard. From Jordan Raanan:​

"They don't spend the fourth overall pick on a kid and not have him come and play tackle," said Herremans, who received a text from general manager Howie Roseman and a phone call from coach Chip Kelly after the pick. "One of the things that has always been big for me is my versatility and being able to play other places. I'm sure they'll probably bump me down to guard and see how everything else works out."

And this quote was buried, but also interesting:

"I was prepared to play tackle, I was prepared to play guard," Herremans said. "I think I can probably steal a few more years at guard, but I still think I have three or four really good years of football left."

See also: The Book of Love According to Herr-Dawg