Writers of Pro Football Prospectus 2008

2017 OFFENSIVE 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. 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 that team's running backs, 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.
  • Stuffed: Percentage of runs where the running back is tackled at or behind the line of scrimmage. Since being stuffed is bad, teams are ranked from stuffed least often (#1) to most often (#32).
  • Second Level Yards: Yards which this team's running backs earn between 5-10 yards past the line of scrimmage, divided by total running back carries.
  • Open Field Yards: Yards which this team's running backs earn 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 offense 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 offense.

A team with a high ranking in Adjusted Line Yards but a low ranking in Open Field Yards is heavily dependent on its offensive line to make the running game work. A team with a low ranking in Adjusted Line Yards but a high ranking in Open Field Yards is heavily dependent on its running back breaking long runs to make the running game work.

However, it is important to understand that these ratings only somewhat separate the offensive line from the running backs. A team with a very good running back will appear higher no matter how bad their line, and a team with a great line with appear lower if the running back is terrible.

Stats in blue represent pass blocking. 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 blocking 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 NE 4.92 4.07 57% 22 18% 5 1.31 5 0.30 29 NO 1 4 2.3%
2 NO 4.80 4.38 50% 27 12% 1 1.13 15 0.84 13 LACH 2 7 3.8%
3 GB 4.78 3.84 70% 13 15% 2 1.04 22 0.22 31 PIT 3 10 3.9%
4 LARM 4.73 4.11 44% 31 22% 22 1.38 3 0.47 25 DAL 4 7 4.0%
5 ATL 4.68 4.83 71% 12 21% 16 1.53 1 1.21 5 LARM 5 9 4.3%
6 TEN 4.68 4.85 70% 13 19% 8 1.15 14 1.25 4 MIN 6 9 4.3%
7 TB 4.50 4.03 56% 23 20% 15 1.09 16 0.67 18 TB 7 8 4.6%
8 KC 4.45 5.86 92% 1 20% 14 1.49 2 2.06 1 BAL 8 12 5.1%
9 BAL 4.38 4.56 77% 5 18% 6 1.27 7 0.99 9 WAS 9 8 5.1%
10 DEN 4.34 4.44 64% 18 19% 11 1.16 12 0.94 10 JAC 10 10 5.5%
11 SF 4.29 4.22 50% 27 22% 20 1.24 9 0.90 11 TEN 11 11 5.7%
12 JAC 4.28 4.75 63% 19 16% 4 1.07 18 1.36 2 MIA 12 10 6.1%
13 PIT 4.20 4.13 80% 4 18% 7 1.26 8 0.61 21 ATL 13 10 6.1%
14 DAL 4.16 4.24 77% 5 19% 12 1.08 17 1.02 7 CHI 14 13 6.8%
15 HOU 4.14 3.87 53% 25 19% 13 1.03 23 0.50 23 NE 15 16 6.9%
16 PHI 4.10 4.46 53% 25 21% 18 1.32 4 1.05 6 OAK 16 13 6.9%
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 WAS 4.05 3.91 44% 30 19% 9 1.01 26 0.63 20 NYG 17 16 7.2%
18 CLE 4.04 3.82 85% 3 15% 3 1.16 11 0.49 24 CLE 18 18 7.3%
19 OAK 4.03 3.71 67% 15 23% 24 1.01 25 0.57 22 PHI 19 16 7.3%
20 CHI 3.91 4.34 75% 7 22% 23 1.31 6 1.00 8 SF 20 18 7.6%
21 MIN 3.89 4.04 63% 19 21% 17 1.03 24 0.85 12 SEA 21 13 7.6%
22 NYG 3.86 4.02 43% 32 21% 19 1.06 19 0.84 14 CAR 22 17 8.3%
23 ARI 3.73 3.11 73% 10 22% 21 0.84 31 0.27 30 ARI 23 21 8.4%
24 MIA 3.73 3.76 75% 7 28% 29 1.23 10 0.44 27 DEN 24 17 8.8%
25 BUF 3.70 3.30 56% 23 24% 26 0.94 29 0.44 26 NYJ 25 19 9.0%
26 NYJ 3.66 4.35 50% 27 24% 27 1.01 26 1.28 3 KC 26 20 9.1%
27 SEA 3.60 3.60 90% 2 29% 31 1.04 21 0.63 19 GB 27 23 9.1%
28 LACH 3.37 3.66 67% 15 28% 30 1.15 13 0.75 16 CIN 28 15 9.2%
29 IND 3.35 3.47 73% 9 25% 28 0.94 28 0.71 17 DET 29 23 9.6%
30 CIN 3.31 3.28 60% 21 19% 10 1.04 20 0.39 28 IND 30 18 9.9%
31 CAR 3.27 2.84 73% 10 24% 25 0.77 32 0.13 32 HOU 31 21 10.1%
32 DET 3.04 3.37 67% 15 31% 32 0.91 30 0.76 15 BUF 32 18 11.2%
x NFL x 4.06 65% x 21% x 1.00 x 0.69 x NFL x 14 7.0%

The 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.

LEFT END LEFT TACKLE MID/GUARD RIGHT TACKLE RIGHT END
TEAM ALY Rank ALY Rank ALY Rank ALY Rank ALY Rank
1 NE 3.05 18 5.65 3 4.83 5 5.33 6 5.27 5
2 NO 4.51 13 5.09 7 4.93 1 4.47 14 4.71 11
3 GB 4.91 9 5.17 6 4.57 10 5.95 2 3.16 24
4 LARM 2.39 26 6.03 2 4.86 3 5.60 4 6.09 1
5 ATL 6.04 6 6.53 1 4.85 4 2.57 29 1.80 32
6 TEN 6.56 4 4.37 14 4.61 8 2.96 24 3.54 19
7 TB 4.48 14 3.60 24 4.18 17 6.23 1 4.81 9
8 KC 4.54 11 1.81 30 4.88 2 4.54 12 4.14 17
9 BAL 6.28 5 4.17 17 4.15 18 3.94 19 5.01 7
10 DEN 7.15 2 5.25 5 3.88 21 5.63 3 4.35 15
11 SF 5.28 8 4.97 9 3.70 26 5.05 9 4.41 14
12 JAC 3.86 15 4.96 10 4.09 19 5.07 8 4.72 10
13 PIT 2.56 22 5.39 4 4.06 20 4.58 11 4.67 13
14 DAL 7.42 1 4.54 11 4.59 9 2.75 28 2.22 30
15 HOU 1.26 30 4.05 19 4.48 13 4.06 17 5.68 2
16 PHI 3.38 16 4.01 20 4.77 6 4.46 15 3.35 21
LEFT END LEFT TACKLE MID/GUARD RIGHT TACKLE RIGHT END
TEAM ALY Rank ALY Rank ALY Rank ALY Rank ALY Rank
17 WAS 4.51 12 1.61 31 4.33 15 5.22 7 2.89 27
18 CLE 5.31 7 4.39 12 4.55 11 0.34 31 3.11 25
19 OAK 2.86 21 3.08 27 4.49 12 4.32 16 3.25 23
20 CHI 4.57 10 4.23 16 3.68 27 4.52 13 2.94 26
21 MIN 2.56 23 4.38 13 3.82 24 4.03 18 4.98 8
22 NYG 1.55 28 3.49 25 3.87 22 4.78 10 5.25 6
23 ARI 2.90 20 4.16 18 3.37 30 5.51 5 4.26 16
24 MIA 1.94 27 5.07 8 3.86 23 3.65 22 3.98 18
25 BUF 0.87 32 1.38 32 4.61 7 3.76 20 5.65 3
26 NYJ 2.50 24 4.30 15 3.53 29 3.69 21 4.69 12
27 SEA 1.52 29 3.91 21 4.43 14 2.05 30 2.77 29
28 LACH 7.01 3 3.60 23 3.09 31 0.11 32 5.52 4
29 IND 3.05 19 2.53 28 3.79 25 3.40 23 2.78 28
30 CIN 1.08 31 3.64 22 4.28 16 2.83 26 1.96 31
31 CAR 2.42 25 3.27 26 3.61 28 2.82 27 3.28 22
32 DET 3.26 17 2.39 29 3.08 32 2.94 25 3.39 20
x NFL 3.86 x 4.13 x 4.16 x 3.98 x 3.86 x

The third table lists how often each team runs in each direction. 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 JAC 180 8% 9% 67% 8% 8%
2 CHI 175 22% 14% 38% 9% 17%
3 BAL 168 10% 15% 64% 8% 4%
4 MIN 159 6% 13% 64% 6% 11%
5 HOU 156 6% 22% 51% 17% 3%
6 PIT 152 5% 10% 68% 10% 7%
7 PHI 149 28% 4% 44% 9% 15%
8 IND 140 5% 14% 56% 16% 8%
9 NE 137 9% 15% 50% 18% 8%
10 LARM 135 16% 4% 60% 8% 12%
10 TEN 135 16% 16% 54% 7% 8%
12 SF 129 11% 14% 50% 9% 16%
13 NYJ 128 5% 13% 59% 19% 5%
13 WAS 128 17% 7% 55% 8% 13%
15 CAR 127 17% 15% 52% 9% 7%
15 DET 127 13% 14% 32% 21% 20%
Team RB
Carries
LEFT
END
LEFT
TACKLE
MID/
GUARD
RIGHT
TACKLE
RIGHT
END
17 DEN 126 2% 10% 69% 13% 6%
18 BUF 125 10% 13% 53% 21% 4%
19 LACH 123 7% 22% 57% 8% 7%
19 NYG 123 7% 14% 60% 15% 4%
21 NO 120 14% 15% 47% 15% 9%
22 ARI 118 13% 13% 52% 9% 14%
23 ATL 116 21% 20% 32% 12% 16%
23 CIN 116 12% 9% 48% 20% 10%
23 MIA 116 12% 10% 53% 17% 8%
26 DAL 115 4% 15% 54% 17% 10%
27 GB 113 21% 17% 42% 11% 8%
27 OAK 113 6% 21% 50% 19% 3%
29 KC 112 11% 6% 47% 14% 21%
30 SEA 101 8% 19% 50% 15% 9%
31 CLE 99 11% 5% 63% 10% 11%
32 TB 91 8% 13% 52% 14% 13%
x NFL x 11% 13% 53% 13% 10%