Writers of Pro Football Prospectus 2008

2017 DEFENSIVE LINES

Regular season totals, through Week 6

Revised as of 10/17/2017

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. Note that in earlier seasons, numbers were normalized to the average RB yards per carry over multiple years. A change in the 2017 offseason has set each year to normalize RB yards per carry for that season only. As of right now, that change is only made on the 2016 and 2017 OL/DL pages.

Opponent adjustments are currently at 60 percent strength.

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 PHI 2.01 2.93 57% 9 33% 1 0.67 1 1.00 27 JAC 1 23 10.6%
2 CLE 2.85 3.16 75% 24 29% 2 0.85 4 0.67 14 PIT 2 20 9.9%
3 DEN 2.90 3.09 50% 4 28% 3 0.70 2 0.65 13 LARM 3 20 9.7%
4 ARI 3.21 3.29 88% 30 25% 7 0.89 5 0.71 18 CAR 4 20 9.0%
5 MIA 3.57 3.74 50% 4 26% 5 1.21 22 0.70 17 LACH 5 18 8.8%
6 BUF 3.59 3.78 60% 13 25% 6 1.12 16 0.78 21 CIN 6 18 8.5%
7 PIT 3.63 5.00 85% 29 19% 19 1.25 24 1.80 32 CHI 7 16 8.4%
8 GB 3.71 3.85 73% 23 23% 9 1.15 19 0.71 19 BAL 8 16 8.1%
9 CAR 3.78 3.70 33% 2 28% 4 1.38 29 0.58 8 DEN 9 13 8.1%
10 MIN 3.87 3.27 0% 1 17% 26 0.81 3 0.20 1 NO 10 16 8.1%
11 SF 3.87 3.60 58% 11 25% 8 1.05 13 0.60 11 WAS 11 15 7.9%
12 BAL 3.90 4.23 73% 20 19% 20 1.21 23 0.94 26 DAL 12 16 7.9%
13 HOU 4.00 3.71 64% 14 23% 12 1.02 9 0.46 5 MIA 13 12 7.9%
14 TB 4.02 3.70 38% 3 23% 10 1.11 15 0.58 9 MIN 14 16 7.9%
15 SEA 4.07 4.84 67% 16 17% 29 1.02 8 1.51 30 HOU 15 15 7.7%
16 LARM 4.08 4.77 57% 9 21% 15 1.03 11 1.61 31 KC 16 15 7.5%
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 NO 4.19 4.38 80% 28 19% 21 1.14 17 0.91 25 GB 17 11 6.7%
18 NYJ 4.23 4.13 67% 16 23% 11 1.31 27 0.67 16 DET 18 13 6.4%
19 CIN 4.27 3.48 50% 4 21% 14 1.03 10 0.22 3 SEA 19 11 6.3%
20 TEN 4.30 3.58 73% 20 18% 23 1.04 12 0.21 2 CLE 20 13 6.3%
21 DET 4.35 3.97 58% 12 15% 30 1.14 18 0.58 10 SF 21 14 6.1%
22 OAK 4.38 4.02 67% 16 17% 27 1.10 14 0.55 6 OAK 22 11 6.1%
23 NYG 4.38 4.28 73% 20 22% 13 1.26 25 0.84 23 NE 23 14 6.0%
24 IND 4.42 4.04 64% 14 18% 22 0.96 6 0.80 22 NYG 24 12 5.9%
25 KC 4.55 4.48 50% 4 20% 18 1.48 31 0.65 12 IND 25 12 5.7%
26 ATL 4.61 4.33 100% 31 17% 28 1.16 20 0.67 14 PHI 26 14 5.7%
27 CHI 4.62 3.99 76% 27 14% 31 0.98 7 0.56 7 BUF 27 12 5.4%
28 WAS 4.66 3.88 75% 24 20% 17 1.18 21 0.36 4 ATL 28 12 5.2%
29 DAL 4.75 4.53 100% 31 18% 25 1.37 28 0.71 20 ARI 29 11 4.8%
30 NE 4.87 4.74 56% 8 12% 32 1.27 26 0.88 24 TEN 30 8 4.2%
31 JAC 4.89 5.37 75% 24 21% 16 1.49 32 1.37 29 TB 31 6 3.6%
32 LACH 4.90 5.19 68% 19 18% 24 1.47 30 1.30 28 NYJ 32 7 3.2%
x NFL x 4.06 65% x 21% x 1.00 x 0.69 x NFL x 14 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 PHI 1.18 2 0.43 1 2.41 1 2.06 2 2.95 11
2 CLE 3.79 15 2.28 4 3.13 4 2.41 6 -0.14 2
3 DEN 2.70 6 2.43 5 3.01 3 2.65 7 4.19 19
4 ARI 3.70 13 3.42 9 3.37 6 3.29 13 2.07 6
5 MIA 4.69 23 6.10 32 2.49 2 2.22 3 3.81 15
6 BUF 3.76 14 5.13 25 3.69 8 2.73 8 1.31 4
7 PIT 6.50 32 4.30 17 3.35 5 3.14 10 2.78 10
8 GB 2.97 8 6.00 31 4.59 23 3.80 16 -0.17 1
9 CAR 5.64 31 2.48 6 4.03 12 4.13 19 3.48 13
10 MIN 3.38 10 0.93 2 4.45 19 4.30 21 3.07 12
11 SF 3.99 17 4.93 22 3.93 9 4.35 22 2.59 8
12 BAL -1.01 1 5.35 29 4.01 11 3.84 17 3.95 17
13 HOU 1.60 3 3.45 10 4.42 18 4.10 18 4.87 22
14 TB 2.62 5 5.33 28 3.48 7 6.10 30 2.78 9
15 SEA 3.45 11 5.06 23 4.00 10 3.78 15 1.98 5
16 LARM 4.08 18 3.65 12 4.21 15 4.61 25 2.57 7
LEFT END LEFT TACKLE MID/GUARD RIGHT TACKLE RIGHT END
TEAM ALY Rank ALY Rank ALY Rank ALY Rank ALY Rank
17 NO 5.03 28 3.10 8 4.15 13 4.36 24 4.11 18
18 NYJ 3.24 9 4.54 19 4.73 29 3.04 9 3.63 14
19 CIN 3.45 12 3.95 14 4.68 26 2.23 4 6.29 30
20 TEN 2.27 4 5.36 30 4.88 30 3.28 12 0.14 3
21 DET 4.83 25 4.29 16 4.63 25 2.30 5 5.05 25
22 OAK 4.75 24 3.85 13 4.53 22 4.35 23 3.86 16
23 NYG 4.84 26 3.55 11 4.30 16 3.19 11 6.19 29
24 IND 4.25 20 2.58 7 4.52 21 4.18 20 5.42 28
25 KC 5.14 29 4.73 21 4.71 27 0.68 1 5.14 26
26 ATL 4.20 19 4.51 18 4.18 14 5.73 28 5.00 24
27 CHI 5.16 30 5.11 24 4.40 17 3.64 14 6.60 31
28 WAS 3.85 16 5.16 26 4.72 28 5.82 29 4.49 20
29 DAL 4.43 21 4.62 20 4.59 24 6.40 31 4.51 21
30 NE 4.62 22 4.10 15 4.96 31 5.03 27 4.98 23
31 JAC 4.96 27 5.25 27 4.47 20 4.80 26 8.52 32
32 LACH 2.89 7 2.20 3 5.01 32 6.67 32 5.37 27
x NFL 3.86 x 4.11 x 4.18 x 3.98 x 3.90 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. Certain teams may have abnormal splits because of specific official scorer tendencies.

Team RB
Carries
LEFT
END
LEFT
TACKLE
MID/
GUARD
RIGHT
TACKLE
RIGHT
END
1 PHI 82 15% 12% 48% 13% 12%
2 WAS 85 19% 6% 53% 9% 13%
3 DEN 102 6% 17% 66% 9% 3%
3 MIA 102 16% 19% 48% 11% 7%
3 NO 102 13% 9% 49% 11% 19%
6 BUF 103 12% 17% 48% 17% 8%
6 SEA 103 13% 23% 49% 12% 4%
8 ATL 107 18% 9% 41% 19% 13%
8 CAR 107 7% 20% 44% 18% 12%
8 DAL 107 12% 16% 51% 10% 10%
11 NE 115 10% 9% 53% 18% 10%
12 CIN 118 14% 21% 50% 8% 7%
13 TB 122 9% 15% 52% 16% 9%
14 MIN 132 12% 8% 54% 15% 10%
15 PIT 135 8% 12% 60% 8% 12%
16 ARI 136 21% 9% 43% 10% 18%
Team RB
Carries
LEFT
END
LEFT
TACKLE
MID/
GUARD
RIGHT
TACKLE
RIGHT
END
16 HOU 136 11% 9% 53% 18% 9%
18 DET 137 14% 18% 47% 9% 12%
19 CLE 140 5% 17% 62% 14% 2%
20 IND 141 13% 10% 50% 10% 18%
20 KC 141 12% 16% 56% 6% 10%
22 TEN 142 7% 13% 61% 14% 5%
23 CHI 144 8% 14% 56% 15% 8%
24 JAC 146 10% 8% 65% 10% 7%
25 NYG 148 18% 14% 41% 14% 13%
26 NYJ 153 5% 12% 57% 18% 8%
27 LARM 155 7% 11% 66% 10% 6%
28 LACH 156 9% 8% 54% 17% 12%
29 GB 158 18% 11% 47% 11% 14%
30 SF 159 16% 12% 49% 11% 11%
31 OAK 161 7% 16% 61% 9% 6%
32 BAL 177 5% 13% 59% 15% 8%
x NFL x 11% 13% 53% 13% 10%