Writers of Pro Football Prospectus 2008

2013 DEFENSIVE LINES

Regular season totals, through Week 17

Revised as of 3/26/2014

Teams are ranked according to Adjusted Line Yards. Based on regression analysis, the Adjusted Line Yards formula takes all running back carries and assigns responsibility to the offensive line based on the following percentages:

  • Losses: 120% value
  • 0-4 Yards: 100% value
  • 5-10 Yards: 50% value
  • 11+ Yards: 0% value

These numbers are then adjusted based on down, distance, situation, opponent, and the difference in rushing average between shotgun compared to standard formations. Finally, we normalize the numbers so that the league average for Adjusted Line Yards per carry is the same as the league average for RB yards per carry. Defensive line stats (more accurately, defensive front seven stats) represent the performance of offensive lines against each defense, adjusted for the quality of offensive opponents. These stats are explained further here.

The following stats are not adjusted for opponent:

  • RB Yards: Yards per carry by running backs against this defense, according to standard NFL numbers.
  • Power Success: Percentage of runs on third or fourth down, two yards or less to go, that achieved a first down or touchdown. Also includes runs on first-and-goal or second-and-goal from the two-yard line or closer. This is the only statistic on this page that includes quarterbacks. Teams are ranked from lowest power success percentage allowed (#1) to highest power success percentage allowed (#32).
  • Stuffed: Percentage of runs where the running back is tackled at or behind the line of scrimmage.Ranked from most stuffs (#1) to fewest stuffs (#32).
  • Second Level Yards: Yards earned by opposing running backs against this team between 5-10 yards past the line of scrimmage, divided by total running back carries.
  • Open Field Yards: Yards earned by opposing running backs against this team more than 10 yards past the line of scrimmage, divided by total running back carries.

NFL averages for each stat given in red.

Why are these rankings different from the team defense DVOA ratings for rushing? Among other reasons, they don't include quarterbacks or fumbles, long runs are truncated, and a different set of adjustments is used, attempting to isolate line play rather than total team defense.

A team with a high ranking in Adjusted Line Yards but a low ranking in Open Field Yards has a strong defensive line but its linebackers and secondary have difficulty in pursuit and tackling. A team with a low ranking in Adjusted Line Yards but a high ranking in Open Field Yards generally allows runners to get past the defensive line but the linebackers and secondary are good at pursuit and tackling. A low ranking in Adjusted Line Yards with a high ranking in Open Field Yards is often an indicator of a 3-4 defensive scheme, though there are exceptions.

Stats in blue represent pass rush. Teams are ranked according to Adjusted Sack Rate, which gives sacks (plus intentional grounding penalties) per pass attempt adjusted for down, distance, and opponent. Pass rush stats are explained further here. Our sack totals may differ slightly from official NFL totals depending on the league's retroactive statistical adjustments.

RUN BLOCKING PASS PROTECTION
Team Adj. Line
Yards
RB
Yards
Power
Success
Power
Rank
Stuffed Stuffed
Rank
2nd Level
Yards
2nd Level
Rank
Open Field
Yards
Open Field
Rank
Team Rank Sacks Adjusted
Sack Rate
1 ARI 3.09 3.19 48% 2 28% 1 1.01 8 0.46 7 STL 1 53 9.5%
2 DET 3.13 4.08 50% 3 26% 4 1.13 19 1.07 29 CAR 2 60 9.2%
3 DEN 3.23 3.61 64% 13 22% 9 1.03 9 0.63 16 BUF 3 57 8.7%
4 NYJ 3.23 3.21 39% 1 26% 3 0.80 1 0.48 8 NO 4 49 8.6%
5 STL 3.50 3.80 51% 4 27% 2 1.13 18 0.77 20 GB 5 44 8.1%
6 WAS 3.58 4.02 68% 22 23% 6 1.18 25 0.82 22 KC 6 47 7.9%
7 TB 3.62 3.95 66% 17 24% 5 1.07 13 0.80 21 SEA 7 44 7.6%
8 NYG 3.62 3.56 66% 19 21% 13 1.00 7 0.44 5 IND 8 42 7.6%
9 CAR 3.65 4.07 74% 27 22% 8 1.19 27 0.83 23 NE 9 48 7.5%
10 MIN 3.67 3.89 60% 9 23% 7 1.19 26 0.64 17 BAL 10 40 7.3%
11 KC 3.67 4.27 56% 7 18% 18 1.03 10 0.94 25 OAK 11 38 7.3%
12 HOU 3.68 4.27 53% 6 22% 10 1.10 16 1.04 27 ARI 12 47 7.2%
13 SEA 3.73 3.75 70% 24 21% 11 1.06 11 0.55 12 WAS 13 36 7.0%
14 NO 3.75 4.40 69% 23 21% 12 1.06 12 1.13 30 CIN 14 43 7.0%
15 CIN 3.82 3.78 60% 10 15% 29 0.99 5 0.43 3 SD 15 35 6.9%
16 CLE 3.83 3.94 79% 32 18% 15 0.97 2 0.65 18 MIA 16 42 6.8%
RUN BLOCKING PASS PROTECTION
Team Adj. Line
Yards
RB
Yards
Power
Success
Power
Rank
Stuffed Stuffed
Rank
2nd Level
Yards
2nd Level
Rank
Open Field
Yards
Open Field
Rank
Team Rank Sacks Adjusted
Sack Rate
17 PHI 3.89 3.61 68% 21 18% 20 0.98 3 0.33 1 MIN 17 41 6.8%
18 OAK 3.95 3.96 73% 25 17% 21 1.16 21 0.45 6 HOU 18 32 6.7%
19 BAL 3.95 3.92 59% 8 18% 16 1.08 14 0.48 9 PHI 19 37 6.7%
20 BUF 3.99 4.54 65% 15 17% 24 1.13 20 1.07 28 TEN 20 36 6.6%
21 JAC 4.01 4.12 74% 28 18% 19 1.09 15 0.75 19 CLE 21 40 6.5%
22 SF 4.12 3.88 66% 18 14% 31 0.99 6 0.42 2 DEN 22 41 6.5%
23 TEN 4.15 4.03 61% 12 17% 23 1.17 22 0.52 10 CHI 23 31 6.3%
24 PIT 4.16 4.07 65% 16 15% 30 0.98 4 0.60 15 NYJ 24 41 6.2%
25 MIA 4.24 4.25 64% 14 15% 28 1.20 28 0.58 13 TB 25 35 6.2%
26 GB 4.26 4.67 77% 30 17% 22 1.38 29 0.88 24 DAL 26 34 6.1%
27 ATL 4.30 4.85 68% 20 16% 25 1.17 23 1.26 31 PIT 27 34 6.1%
28 IND 4.30 4.25 53% 5 16% 26 1.18 24 0.58 14 NYG 28 34 6.1%
29 DAL 4.34 4.84 76% 29 18% 17 1.48 31 0.98 26 SF 29 38 6.0%
30 NE 4.37 4.24 60% 11 13% 32 1.12 17 0.43 4 JAC 30 31 6.0%
31 SD 4.45 4.46 73% 26 16% 27 1.39 30 0.55 11 DET 31 33 5.8%
32 CHI 4.45 5.34 77% 31 20% 14 1.57 32 1.40 32 ATL 32 32 5.3%
x NFL x 4.10 64% x 19% x 1.01 x 0.65 x NFL x 40 7.0%

This second table lists each team's Adjusted Line Yards in each direction listed in official NFL play-by-play, along with rank among the 32 teams. Only five directions are listed because research so far shows no statistically significant difference between how well a team performs on runs listed middle, left guard, and right guard. These runs are from the perspective of the OFFENSE, so a run listed as LEFT TACKLE is actually at the RIGHT defensive end.

LEFT END LEFT TACKLE MID/GUARD RIGHT TACKLE RIGHT END
TEAM ALY Rank ALY Rank ALY Rank ALY Rank ALY Rank
1 ARI 1.54 1 2.56 1 3.39 3 3.17 7 3.76 17
2 DET 1.80 2 3.50 8 3.20 2 2.91 5 3.96 19
3 DEN 3.93 19 3.80 11 2.91 1 2.70 3 4.22 26
4 NYJ 2.66 6 3.27 3 3.53 7 2.49 2 3.51 14
5 STL 3.20 8 3.31 4 3.49 6 3.76 15 3.68 16
6 WAS 1.94 3 4.33 26 3.91 16 3.79 16 3.98 20
7 TB 3.07 7 4.24 24 3.45 4 4.35 23 3.37 11
8 NYG 3.75 18 3.48 7 3.61 9 4.13 21 3.20 8
9 CAR 3.69 16 3.36 5 3.97 18 2.42 1 2.12 1
10 MIN 3.53 13 4.21 21 3.47 5 4.71 27 2.74 3
11 KC 3.38 10 3.84 13 3.82 10 3.04 6 3.00 5
12 HOU 4.66 30 3.70 9 3.60 8 3.71 13 3.23 9
13 SEA 2.50 5 3.83 12 3.90 15 3.40 11 4.15 24
14 NO 3.61 15 4.05 17 3.88 11 3.41 12 3.67 15
15 CIN 3.44 12 4.82 29 3.89 12 3.24 8 3.41 12
16 CLE 4.75 31 2.76 2 4.01 19 3.37 10 4.10 21
LEFT END LEFT TACKLE MID/GUARD RIGHT TACKLE RIGHT END
TEAM ALY Rank ALY Rank ALY Rank ALY Rank ALY Rank
17 PHI 4.35 27 4.02 16 3.89 13 4.47 24 2.67 2
18 OAK 3.42 11 3.85 14 3.89 14 4.78 30 4.11 22
19 BAL 4.47 28 4.10 19 4.25 28 2.88 4 2.75 4
20 BUF 2.35 4 4.22 23 4.17 24 3.29 9 4.51 29
21 JAC 3.94 20 4.11 20 4.19 26 3.73 14 3.16 6
22 SF 3.36 9 4.06 18 4.35 29 3.90 17 3.18 7
23 TEN 4.05 25 3.43 6 4.24 27 4.11 20 5.16 32
24 PIT 3.98 23 4.90 30 3.94 17 4.27 22 4.68 31
25 MIA 4.25 26 3.89 15 4.16 22 5.07 32 3.34 10
26 GB 4.49 29 4.47 27 4.10 20 4.05 19 4.62 30
27 ATL 3.95 21 5.00 32 4.17 23 4.73 28 4.17 25
28 IND 5.14 32 3.79 10 4.14 21 5.06 31 4.11 23
29 DAL 3.74 17 4.90 31 4.18 25 4.63 26 4.42 28
30 NE 3.98 22 4.22 22 4.62 31 3.93 18 3.48 13
31 SD 3.98 24 4.28 25 4.61 30 4.52 25 4.33 27
32 CHI 3.60 14 4.58 28 4.79 32 4.73 29 3.92 18
x NFL 3.59 x 3.98 x 3.95 x 3.90 x 3.72 x

The third table lists how often each team runs in each direction. These runs are from the perspective of the OFFENSE, so a run listed as LEFT TACKLE is actually at the RIGHT defensive end. Numbers may not add up to 100% due to carries listed without direction.

Team RB
Carries
LEFT
END
LEFT
TACKLE
MID/
GUARD
RIGHT
TACKLE
RIGHT
END
1 CAR 301 7% 8% 70% 9% 6%
2 ARI 311 11% 10% 57% 11% 10%
3 DET 311 12% 16% 45% 15% 12%
4 SD 315 12% 14% 50% 15% 9%
5 NO 334 15% 16% 49% 13% 6%
6 CIN 344 10% 12% 57% 14% 8%
7 SF 347 7% 13% 60% 16% 4%
8 SEA 356 5% 17% 54% 19% 5%
9 DEN 359 11% 15% 57% 11% 8%
10 NYJ 364 10% 18% 48% 16% 9%
11 KC 366 11% 10% 66% 5% 7%
12 MIN 369 12% 12% 52% 15% 8%
13 TB 369 13% 15% 49% 12% 12%
14 IND 370 9% 11% 56% 13% 11%
15 NYG 373 20% 11% 43% 11% 14%
16 PHI 374 22% 14% 39% 12% 13%
Team RB
Carries
LEFT
END
LEFT
TACKLE
MID/
GUARD
RIGHT
TACKLE
RIGHT
END
17 WAS 376 19% 11% 40% 17% 14%
18 BAL 378 6% 12% 62% 11% 9%
19 DAL 380 12% 15% 43% 14% 15%
20 PIT 380 6% 14% 62% 14% 4%
21 OAK 387 13% 17% 49% 12% 8%
22 TEN 387 10% 13% 55% 15% 6%
23 GB 388 13% 14% 44% 18% 12%
24 STL 391 11% 18% 42% 18% 11%
25 ATL 394 17% 11% 45% 12% 14%
26 CLE 394 8% 13% 63% 12% 4%
27 HOU 402 7% 7% 70% 11% 4%
28 BUF 419 5% 13% 67% 11% 4%
29 MIA 421 12% 11% 57% 16% 5%
30 JAC 427 14% 8% 60% 7% 10%
31 CHI 430 17% 15% 43% 13% 11%
32 NE 430 6% 13% 62% 13% 6%
x NFL x 11% 13% 54% 13% 9%