Writers of Pro Football Prospectus 2008

OFFENSIVE LINES 1997

Regular season totals, through Week 17

Revised as of 8/8/2012

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.

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 10+ 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 10+ 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 DEN 4.84 4.68 63% 16 13% 1 1.41 2 0.66 12 MIA 1 22 4.4%
2 TEN 4.31 4.03 61% 17 17% 6 1.19 9 0.43 24 PIT 2 21 4.4%
3 CAR 4.31 4.07 83% 1 15% 2 1.12 14 0.46 22 GB 3 26 5.1%
4 PHI 4.31 4.18 63% 15 17% 5 1.20 8 0.62 13 WAS 4 33 5.9%
5 PIT 4.29 4.20 74% 5 17% 7 1.25 7 0.60 15 MIN 5 34 6.0%
6 GB 4.26 4.31 65% 13 19% 15 1.31 5 0.74 9 NE 6 30 6.1%
7 KC 4.25 4.02 76% 3 16% 3 1.17 10 0.50 20 SEA 7 35 6.1%
8 DAL 4.22 4.02 58% 23 18% 13 1.14 13 0.55 17 KC 8 32 6.5%
9 MIN 4.17 4.54 76% 2 18% 9 1.10 18 1.12 3 BAL 9 37 6.6%
10 JAC 4.14 3.59 60% 20 19% 16 0.96 25 0.39 27 DAL 10 39 7.0%
11 BAL 4.12 3.74 70% 8 18% 10 1.16 11 0.31 29 CHI 11 43 7.1%
12 NYG 4.12 4.00 65% 11 19% 14 1.10 17 0.68 11 STL 12 45 7.2%
13 DET 4.11 5.83 65% 12 21% 20 1.52 1 2.20 1 CAR 13 44 7.3%
14 WAS 4.09 3.70 52% 27 21% 19 0.98 22 0.52 18 NYG 14 34 7.3%
15 BUF 4.09 4.32 61% 18 20% 18 1.34 4 0.79 8 DET 15 41 7.3%
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
16 CIN 4.05 4.35 75% 4 19% 17 1.10 16 1.02 4 DEN 16 35 7.4%
17 TB 3.99 4.02 67% 10 18% 11 0.97 23 0.80 7 TEN 17 32 7.4%
18 SEA 3.98 4.54 59% 22 24% 25 1.40 3 1.01 5 TB 18 32 7.7%
19 NE 3.96 3.92 59% 21 22% 22 0.98 21 0.72 10 SD 19 51 7.8%
20 IND 3.93 3.77 52% 28 23% 24 1.07 19 0.60 16 JAC 20 40 7.9%
21 SF 3.92 3.88 71% 7 17% 8 1.01 20 0.62 14 BUF 21 46 8.3%
22 SD 3.81 3.56 55% 25 18% 12 0.93 26 0.45 23 NYJ 22 48 8.6%
23 MIA 3.79 3.30 51% 29 21% 21 0.90 29 0.33 28 CIN 23 47 8.9%
24 CHI 3.77 3.56 63% 14 17% 4 0.92 28 0.43 25 SF 24 45 9.4%
25 NYJ 3.70 3.56 71% 6 24% 26 1.11 15 0.42 26 PHI 25 64 9.7%
26 STL 3.66 3.43 42% 30 23% 23 0.96 24 0.48 21 ATL 26 55 9.7%
27 ATL 3.53 3.67 54% 26 26% 28 0.93 27 0.81 6 NO 27 51 9.8%
28 NO 3.43 3.55 60% 19 27% 29 1.16 12 0.50 19 OAK 28 58 10.6%
29 ARI 3.30 2.97 70% 9 24% 27 0.83 30 0.21 30 ARI 29 78 11.4%
30 OAK 3.27 4.48 55% 24 27% 30 1.25 6 1.50 2 IND 30 62 11.7%
x NFL x 4.00 63% x 20% x 1.02 x 0.62 x NFL x 42 7.7%

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 30 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 DEN 5.29 3 5.06 4 4.80 1 4.65 8 4.87 3
2 TEN 3.58 25 4.74 8 4.28 6 4.30 15 4.34 8
3 CAR 5.15 5 4.51 11 4.38 4 4.72 6 3.65 19
4 PHI 4.61 7 4.02 22 4.14 13 5.09 2 4.51 6
5 PIT 3.84 20 4.94 5 4.39 3 4.39 13 3.68 18
6 GB 5.34 2 4.15 20 4.44 2 5.03 4 3.99 13
7 KC 3.76 21 5.18 3 4.27 7 5.05 3 4.23 11
8 DAL 3.58 24 4.79 6 4.18 11 4.15 17 4.56 5
9 MIN 4.06 15 4.54 10 4.22 9 4.02 19 4.68 4
10 JAC 5.16 4 3.94 23 4.31 5 4.16 16 2.51 29
11 BAL 4.18 13 4.07 21 4.15 12 4.39 12 3.59 21
12 NYG 4.17 14 4.61 9 3.93 21 4.03 18 4.25 10
13 DET 4.32 10 4.36 17 3.76 24 4.95 5 4.49 7
14 WAS 4.41 9 4.38 15 4.00 17 4.47 10 3.31 24
15 BUF 3.48 26 5.69 1 4.03 15 3.24 28 3.96 15
LEFT END LEFT TACKLE MID/GUARD RIGHT TACKLE RIGHT END
TEAM ALY Rank ALY Rank ALY Rank ALY Rank ALY Rank
16 CIN 4.32 11 4.37 16 4.09 14 2.75 30 4.22 12
17 TB 5.55 1 3.51 27 4.18 10 4.36 14 2.85 27
18 SEA 4.03 16 3.72 25 4.26 8 5.28 1 3.98 14
19 NE 3.88 19 4.22 19 3.65 25 4.54 9 5.18 1
20 IND 4.45 8 3.86 24 3.94 20 3.93 20 3.92 16
21 SF 3.60 23 3.29 30 3.92 23 3.85 22 5.17 2
22 SD 4.66 6 4.38 14 3.96 19 4.68 7 4.29 9
23 MIA 3.99 18 4.25 18 4.03 16 3.05 29 3.79 17
24 CHI 3.68 22 3.66 26 3.99 18 3.91 21 2.84 28
25 NYJ 4.01 17 4.40 13 3.92 22 3.25 27 3.03 25
26 STL 3.10 27 4.75 7 3.53 27 3.59 24 3.51 22
27 ATL 2.93 30 4.47 12 3.39 28 4.40 11 3.34 23
28 NO 4.30 12 3.48 28 3.12 30 3.54 26 3.62 20
29 ARI 3.10 28 3.35 29 3.62 26 3.55 25 2.40 30
30 OAK 3.02 29 5.42 2 3.36 29 3.84 23 3.01 26
x NFL 4.12 x 4.33 x 4.03 x 4.19 x 3.90 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.

Team RB
Carries
LEFT
END
LEFT
TACKLE
MID/
GUARD
RIGHT
TACKLE
RIGHT
END
1 NYG 487 14% 12% 44% 12% 18%
2 PIT 467 13% 15% 47% 10% 14%
3 SF 458 9% 11% 52% 16% 12%
4 DEN 456 13% 18% 51% 11% 5%
5 KC 456 12% 6% 66% 4% 11%
6 TB 435 5% 8% 75% 6% 4%
7 CHI 434 8% 18% 57% 10% 6%
8 TEN 432 8% 19% 50% 14% 8%
9 PHI 426 18% 24% 45% 10% 3%
10 WAS 406 12% 9% 56% 15% 9%
11 DET 403 16% 14% 42% 16% 10%
12 MIA 403 12% 11% 56% 10% 10%
13 CAR 400 9% 7% 63% 12% 9%
14 IND 398 10% 9% 49% 17% 15%
15 CIN 396 22% 6% 43% 10% 17%
Team RB
Carries
LEFT
END
LEFT
TACKLE
MID/
GUARD
RIGHT
TACKLE
RIGHT
END
16 GB 392 13% 9% 46% 13% 16%
17 JAC 391 9% 18% 53% 12% 7%
18 DAL 390 15% 17% 41% 15% 12%
19 STL 389 8% 15% 55% 11% 10%
20 NYJ 385 16% 13% 44% 15% 11%
21 ATL 384 9% 11% 57% 14% 7%
22 MIN 383 11% 10% 62% 8% 8%
23 BAL 371 9% 14% 53% 16% 7%
24 BUF 370 7% 16% 60% 12% 4%
25 SD 370 13% 8% 54% 10% 7%
26 NE 366 8% 12% 56% 11% 13%
27 SEA 364 12% 12% 40% 15% 17%
28 NO 363 18% 15% 48% 7% 12%
29 OAK 337 25% 7% 42% 10% 13%
30 ARI 333 12% 14% 44% 13% 16%
x NFL x 12% 13% 52% 12% 10%