FanPost

here's a great article on offensive line statistics

 

Published on Football Outsiders (http://www.footballoutsiders.com)

 

2009 OFFENSIVE LINES By Aaron Schatz Created 09/16/2009 - 11:04am

 

Offensive Line

Regular season totals, through Week 17

Revised as of 1/4/2010

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 [1].

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).
  • 2nd Level Yards: Yardage gained by running backs between five and 10 yards past the line of scrimmage, divided by total running back carries.
  • Open Field Yards: Yardage gained by running backs at least 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 [2] 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 [3]. 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 MIA 4.50 4.44 79% 2 14% 1 1.00 28 0.63 22 IND 1 13 3.1%
2 NO 4.48 4.62 69% 7 17% 9 1.27 8 0.93 9 NE 2 18 3.6%
3 DAL 4.47 4.99 58% 26 17% 7 1.36 3 1.16 5 TEN 3 15 3.7%
4 BAL 4.42 4.97 68% 9 17% 8 1.29 6 1.26 3 NO 4 21 4.2%
5 NE 4.39 4.29 68% 10 14% 2 1.22 11 0.59 26 SD 5 26 4.5%
6 DEN 4.30 4.27 58% 27 20% 20 1.29 5 0.61 24 ATL 6 27 4.6%
7 PHI 4.30 4.25 63% 19 18% 11 1.05 25 0.61 25 ARI 7 26 5.2%
8 GB 4.29 4.17 73% 3 16% 4 1.04 26 0.73 17 HOU 8 26 5.2%
9 NYJ 4.28 4.48 70% 6 16% 3 1.11 20 0.88 12 NYG 9 32 5.3%
10 ATL 4.26 4.36 63% 17 18% 12 1.12 17 0.89 10 CIN 10 29 5.6%
11 JAC 4.25 4.55 69% 8 19% 14 1.12 18 1.07 6 TB 11 33 5.7%
12 BUF 4.19 4.29 50% 31 17% 10 1.15 16 0.63 21 DEN 12 34 5.9%
13 NYG 4.15 4.19 60% 20 19% 15 1.24 10 0.68 19 CHI 13 35 5.9%
14 PIT 4.13 4.32 72% 5 20% 19 1.18 15 0.87 13 MIN 14 34 6.0%
15 HOU 4.10 3.73 60% 21 22% 26 1.12 19 0.41 31 CLE 15 30 6.1%
16 ARI 4.09 4.27 56% 28 22% 29 1.36 2 0.81 14 DAL 16 34 6.2%
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 CAR 4.03 4.93 67% 11 22% 23 1.40 1 1.31 2 CAR 17 33 6.5%
18 SD 4.02 3.54 46% 32 16% 6 0.95 31 0.40 32 MIA 18 34 6.6%
19 CHI 4.02 4.04 58% 25 19% 16 0.95 30 0.81 15 BAL 19 37 6.6%
20 MIN 4.01 4.18 59% 23 23% 31 1.18 14 0.94 8 PHI 20 40 6.6%
21 TEN 4.01 5.29 64% 15 22% 28 1.28 7 1.77 1 SEA 21 41 7.0%
22 CLE 4.01 3.93 65% 14 18% 13 1.10 22 0.50 30 DET 22 43 7.0%
23 OAK 3.97 4.02 72% 4 16% 5 1.03 27 0.63 20 NYJ 23 30 7.7%
24 CIN 3.97 4.14 79% 1 19% 17 1.20 12 0.74 16 STL 24 44 7.7%
25 IND 3.93 3.80 66% 12 22% 27 1.11 21 0.51 29 KC 25 46 7.8%
26 WAS 3.92 3.72 59% 24 19% 18 0.99 29 0.54 28 SF 26 40 8.1%
27 SEA 3.91 4.15 56% 29 22% 24 1.19 13 0.72 18 WAS 27 46 8.5%
28 STL 3.86 4.38 56% 30 22% 25 1.34 4 0.88 11 JAC 28 44 8.5%
29 DET 3.64 3.72 59% 22 23% 30 1.07 23 0.56 27 PIT 29 50 8.5%
30 KC 3.60 4.34 63% 18 21% 22 1.24 9 0.97 7 GB 30 51 8.6%
31 TB 3.58 3.80 65% 13 21% 21 1.06 24 0.62 23 OAK 31 49 9.4%
32 SF 3.50 4.22 63% 16 24% 32 0.92 32 1.25 4 BUF 32 46 9.9%
x NFL x 4.29 64% x 19% x 1.16 x 0.82 x NFL x 35 6.4%

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 MIA 4.99 7 3.46 31 4.59 3 4.34 8 4.11 18
2 NO 3.67 24 4.17 14 4.65 2 4.63 4 4.86 3
3 DAL 5.21 3 5.03 4 4.19 13 4.16 15 4.80 6
4 BAL 4.22 17 4.15 15 4.46 5 3.98 18 5.40 1
5 NE 4.96 9 4.21 13 4.55 4 3.84 23 3.63 25
6 DEN 4.96 8 3.47 30 4.41 6 3.38 28 5.06 2
7 PHI 4.36 15 5.17 3 4.07 18 4.26 10 4.23 15
8 GB 2.83 30 3.76 24 4.71 1 4.26 12 4.86 4
9 NYJ 3.05 29 4.06 17 4.21 12 5.06 1 3.75 23
10 ATL 5.18 5 3.84 21 4.12 15 3.96 19 4.62 10
11 JAC 5.66 1 4.53 8 4.06 19 3.92 21 4.45 11
12 BUF 3.27 26 4.21 12 4.39 7 3.22 30 4.77 7
13 NYG 4.11 19 4.05 18 4.04 21 4.56 6 4.19 17
14 PIT 4.58 14 4.30 11 4.08 17 3.72 25 4.72 8
15 HOU 3.62 25 3.56 28 4.24 11 4.16 14 4.64 9
16 ARI 5.47 2 3.80 22 3.94 24 4.27 9 3.72 24
LEFT END LEFT TACKLE MID/GUARD RIGHT TACKLE RIGHT END
TEAM ALY Rank ALY Rank ALY Rank ALY Rank ALY Rank
17 CAR 4.05 21 4.92 5 3.98 22 3.57 27 3.53 26
18 SD 3.20 27 4.34 10 3.85 25 4.79 2 4.41 12
19 CHI 4.93 10 3.78 23 4.05 20 3.37 29 3.93 21
20 MIN 3.83 22 4.60 7 4.10 16 3.67 26 3.83 22
21 TEN 4.11 20 3.55 29 3.71 27 4.35 7 4.82 5
22 CLE 5.21 4 3.72 26 3.97 23 4.09 17 2.73 29
23 OAK 4.81 11 3.74 25 3.72 26 4.12 16 4.27 14
24 CIN 3.79 23 4.46 9 4.26 10 3.82 24 2.79 28
25 IND 2.63 31 3.96 19 4.39 8 3.92 20 3.94 20
26 WAS 3.19 28 3.95 20 4.30 9 4.60 5 3.13 27
27 SEA 1.26 32 4.10 16 4.16 14 4.22 13 4.29 13
28 STL 4.70 12 5.27 2 3.70 28 3.88 22 2.67 30
29 DET 5.18 6 3.56 27 3.28 31 4.71 3 2.13 32
30 KC 4.30 16 5.66 1 3.34 30 1.92 32 4.19 16
31 TB 4.18 18 4.86 6 3.17 32 4.26 11 2.42 31
32 SF 4.58 13 2.63 32 3.51 29 3.22 31 4.02 19
x NFL 4.20 x 4.14 x 4.08 x 4.08 x 4.05 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 NYJ 533 6% 10% 52% 23% 9%
2 CAR 491 10% 15% 52% 14% 9%
3 MIA 455 14% 7% 60% 11% 9%
4 CIN 452 10% 19% 40% 17% 14%
5 NO 431 11% 16% 51% 14% 8%
6 TEN 431 15% 13% 42% 16% 14%
7 MIN 426 13% 12% 51% 11% 13%
8 BAL 419 11% 13% 55% 12% 9%
9 NE 418 9% 15% 58% 11% 6%
10 NYG 413 13% 14% 40% 17% 15%
11 CLE 408 7% 14% 63% 14% 2%
12 ATL 405 13% 13% 53% 10% 11%
13 DEN 405 11% 13% 51% 13% 13%
14 DAL 394 11% 15% 52% 13% 9%
15 SD 385 11% 9% 57% 15% 9%
16 KC 379 16% 8% 50% 12% 14%
Team RB
Carries
LEFT
END
LEFT
TACKLE
MID/
GUARD
RIGHT
TACKLE
RIGHT
END
17 STL 378 5% 11% 50% 24% 10%
18 PIT 377 7% 11% 54% 19% 10%
19 GB 374 11% 20% 40% 14% 17%
20 BUF 367 7% 11% 61% 11% 9%
21 HOU 365 7% 19% 45% 19% 10%
22 OAK 360 11% 16% 44% 20% 9%
23 JAC 355 9% 5% 76% 4% 7%
24 DET 353 14% 18% 33% 17% 18%
25 SEA 349 9% 15% 43% 22% 11%
26 TB 343 9% 11% 59% 16% 6%
27 IND 338 13% 19% 35% 16% 17%
28 WAS 338 18% 17% 38% 14% 14%
29 ARI 330 14% 14% 38% 22% 12%
30 SF 329 5% 7% 71% 12% 6%
31 CHI 327 11% 12% 54% 12% 11%
32 PHI 301 14% 13% 46% 10% 17%
x NFL x 11% 13% 50% 15% 11%



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Links:
[1] http://www.footballoutsiders.com/info/methods#aly
[2] http://www.footballoutsiders.com/stats/teamoff
[3] http://www.footballoutsiders.com/info/glossary#asr

This FanPost was created by a registered user of The Daily Norseman, and does not necessarily reflect the views of the staff of the site. However, since this is a community, that view is no less important.

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