Writers of Pro Football Prospectus 2008

OFFENSIVE LINES 1998

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 4.45 4.83 63% 14 18% 7 1.33 2 1.15 3 IND 1 22 4.1%
2 SF 4.41 5.02 70% 6 17% 1 1.40 1 1.24 2 DAL 2 19 4.4%
3 DAL 4.31 4.13 59% 17 20% 13 1.18 7 0.70 15 MIN 3 24 4.5%
4 BUF 4.23 3.83 62% 15 18% 6 1.05 21 0.40 29 MIA 4 24 4.5%
5 ATL 4.20 4.29 77% 3 19% 10 1.13 16 0.88 7 NYJ 5 26 4.8%
6 TB 4.16 4.06 70% 7 19% 11 1.15 13 0.64 18 DEN 6 26 5.2%
7 WAS 4.15 4.19 77% 2 18% 8 1.14 15 0.74 11 SD 7 37 5.7%
8 NYG 4.11 4.03 68% 9 17% 2 1.26 3 0.50 25 CHI 8 31 6.1%
9 GB 4.06 3.52 55% 21 20% 15 1.08 18 0.24 30 TB 9 28 6.5%
10 PIT 4.06 3.97 63% 13 18% 5 1.18 8 0.49 26 GB 10 39 6.6%
11 KC 4.00 3.55 64% 12 20% 14 0.95 26 0.44 28 NYG 11 35 6.6%
12 MIN 3.99 4.46 56% 20 22% 17 1.18 9 1.13 4 NE 12 40 6.7%
13 PHI 3.97 4.12 61% 16 17% 3 1.06 20 0.76 10 KC 13 37 6.8%
14 BAL 3.95 4.06 67% 10 19% 12 1.07 19 0.81 9 SEA 14 34 6.9%
15 CHI 3.89 3.77 74% 4 17% 4 0.96 25 0.53 22 TEN 15 37 7.7%
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 SD 3.85 3.84 79% 1 23% 21 1.14 14 0.54 20 PIT 16 36 7.8%
17 JAC 3.85 4.33 68% 8 23% 22 1.17 10 1.12 5 JAC 17 39 8.1%
18 SEA 3.84 4.00 57% 19 22% 19 1.16 11 0.74 13 STL 18 50 8.2%
19 NYJ 3.82 3.68 58% 18 21% 16 1.05 22 0.52 23 ARI 19 50 8.3%
20 CAR 3.80 3.66 65% 11 19% 9 1.03 23 0.51 24 BAL 20 41 8.7%
21 CIN 3.76 3.99 53% 23 23% 20 1.21 5 0.69 16 BUF 21 42 8.8%
22 ARI 3.76 3.59 51% 26 22% 18 1.01 24 0.49 27 SF 22 53 9.0%
23 NE 3.69 3.91 48% 27 25% 27 0.94 28 0.97 6 DET 23 46 9.1%
24 OAK 3.66 3.99 51% 25 25% 25 1.09 17 0.84 8 CAR 24 54 9.4%
25 STL 3.61 3.38 54% 22 25% 26 0.91 29 0.53 21 PHI 25 57 9.6%
26 TEN 3.58 3.75 73% 5 24% 23 1.16 12 0.65 17 CIN 26 52 9.6%
27 IND 3.55 3.90 52% 24 24% 24 1.19 6 0.74 12 WAS 27 61 9.7%
28 MIA 3.49 3.53 40% 30 26% 28 0.95 27 0.70 14 NO 28 57 9.9%
29 DET 3.45 4.28 42% 29 28% 30 1.23 4 1.28 1 ATL 29 51 10.1%
30 NO 3.25 3.28 46% 28 27% 29 0.91 30 0.54 19 OAK 30 67 11.1%
x NFL x 3.98 60% x 21% x 1.02 x 0.66 x NFL x 41 7.5%

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 5.91 1 3.97 18 4.44 3 3.63 21 4.74 3
2 SF 2.94 28 5.07 2 4.73 1 4.41 8 3.58 16
3 DAL 4.89 7 4.11 13 4.17 10 4.31 11 4.38 9
4 BUF 3.98 19 4.52 5 4.14 13 5.10 1 3.25 22
5 ATL 5.31 4 4.01 16 4.03 15 4.17 12 4.70 5
6 TB 5.19 5 4.47 7 4.20 8 2.63 30 5.94 1
7 WAS 5.37 3 3.38 26 4.30 5 4.38 9 2.69 29
8 NYG 4.38 9 4.16 11 4.36 4 3.70 20 4.56 7
9 GB 4.50 8 5.16 1 4.02 16 4.58 6 5.09 2
10 PIT 3.40 24 3.18 28 4.61 2 3.95 15 3.92 12
11 KC 4.01 16 3.94 20 4.12 14 3.94 16 3.90 13
12 MIN 4.06 14 3.98 17 4.23 7 3.36 25 2.91 26
13 PHI 4.94 6 4.34 10 3.73 23 4.72 3 3.26 21
14 BAL 3.69 22 4.44 8 4.17 9 3.36 26 4.38 8
15 CHI 3.80 20 3.29 27 4.15 12 3.11 28 4.68 6
LEFT END LEFT TACKLE MID/GUARD RIGHT TACKLE RIGHT END
TEAM ALY Rank ALY Rank ALY Rank ALY Rank ALY Rank
16 SD 5.85 2 4.56 4 4.26 6 4.83 2 3.66 15
17 JAC 4.36 10 3.91 22 3.82 18 3.94 17 3.23 23
18 SEA 4.30 12 4.49 6 4.15 11 3.73 18 4.18 10
19 NYJ 3.80 21 3.00 30 3.80 19 3.44 24 4.73 4
20 CAR 3.99 17 4.08 14 3.62 27 4.55 7 3.99 11
21 CIN 3.12 25 4.34 9 3.79 20 4.58 5 3.80 14
22 ARI 4.09 13 3.14 29 3.67 24 4.67 4 3.29 20
23 NE 2.80 29 3.92 21 3.84 17 4.04 13 3.32 18
24 OAK 3.65 23 4.12 12 3.67 25 3.73 19 3.39 17
25 STL 4.05 15 4.08 15 3.63 26 2.77 29 3.08 24
26 TEN 4.32 11 3.94 19 3.61 28 3.59 22 2.73 28
27 IND 3.09 27 4.65 3 3.78 21 3.49 23 2.88 27
28 MIA 1.08 30 3.56 24 3.76 22 3.99 14 2.98 25
29 DET 3.98 18 3.53 25 3.52 29 4.32 10 3.31 19
30 NO 3.10 26 3.69 23 3.40 30 3.21 27 2.39 30
x NFL 4.12 x 3.98 x 4.02 x 3.98 x 3.81 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 TB 474 7% 12% 66% 6% 6%
2 NYJ 462 12% 17% 39% 11% 21%
3 DEN 458 17% 20% 36% 13% 4%
4 ATL 457 10% 10% 68% 7% 5%
5 BUF 453 6% 13% 62% 13% 4%
6 DAL 451 22% 17% 37% 13% 8%
7 MIA 431 8% 11% 52% 19% 9%
8 NYG 427 17% 12% 41% 12% 15%
9 JAC 418 9% 17% 53% 15% 4%
10 CHI 413 8% 13% 63% 11% 5%
11 SD 411 9% 14% 51% 8% 9%
12 SF 405 7% 6% 63% 11% 12%
13 OAK 401 14% 12% 43% 14% 12%
14 PIT 397 13% 16% 51% 9% 10%
15 GB 395 16% 8% 44% 12% 15%
Team RB
Carries
LEFT
END
LEFT
TACKLE
MID/
GUARD
RIGHT
TACKLE
RIGHT
END
16 ARI 394 19% 17% 37% 13% 8%
17 MIN 390 11% 11% 57% 12% 8%
18 PHI 387 13% 15% 43% 18% 8%
19 DET 385 20% 10% 38% 8% 21%
20 TEN 378 15% 15% 52% 12% 6%
21 KC 377 6% 7% 56% 7% 4%
22 SEA 375 15% 13% 37% 19% 13%
23 CAR 370 15% 12% 56% 8% 8%
24 CIN 370 19% 10% 51% 8% 10%
25 IND 365 14% 13% 48% 12% 12%
26 NE 364 9% 14% 50% 13% 13%
27 BAL 350 18% 15% 43% 15% 8%
28 WAS 347 12% 13% 51% 16% 7%
29 STL 339 15% 16% 46% 11% 12%
30 NO 324 22% 13% 48% 6% 12%
x NFL x 13% 13% 50% 12% 10%