2021 Basic Offensive Line Stats

RUN BLOCKING												PASS PROTECTION
RK	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	Rank	Sacks	Adjusted Sack Rate
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This table explained

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.
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 team 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 or defense.

For 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.

For 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 protection. 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 protection stats are explained further here. Please be aware that quarterbacks bear responsibility for some of their own sacks and these metrics are not a pure rating of pass protection. Sack totals may differ slightly from official NFL totals depending on the league's retroactive statistical adjustments.

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