How football's opponent-adjusted efficiency metric works — and how to read a number that lives on a percentage scale.
By C. B. Zakarian · Published June 16, 2026
DVOA (Defense-adjusted Value Over Average) grades every play against the league-average result in the same situation (down, distance, field position, time remaining and score), adjusts for the quality of the opponent, and reports the total as a percentage above or below average. 0% is exactly average: a positive DVOA is good for an offense, and a negative DVOA is good for a defense, because a defense's DVOA measures the value it allowed.
Related: Expected points and EPA · Success rate
DVOA stands for Defense-adjusted Value Over Average. It is one of the original "advanced" NFL efficiency metrics, and its core idea is deceptively simple: every single play in a football game is worth something, and that something depends entirely on the situation it occurred in. A 4-yard gain is a great play on 3rd-and-2 and a disappointing one on 3rd-and-9. DVOA grades each play against what an average NFL offense would have done in that exact spot.
To do that, DVOA defines a baseline for every situation: the specific combination of down, distance, field position, time remaining, and score. It compares the result of each play to that baseline, sums the differences across a whole season, and then applies one more crucial step - it adjusts for the quality of the opponent. The result is expressed as a percentage above or below the league average.
"Compared to a league-average team in the exact same situations, how much better or worse did this team perform?"
You don't need the proprietary weights to understand the logic. Conceptually, DVOA builds up from a per-play value and then standardizes it against the league:
Play Value = (Result of play) - (League-average result in that situation)
Each play's value is then adjusted for opponent strength, the values are aggregated, and the total is divided by a league-average baseline so it reads as a percentage:
DVOA ≈ (Opponent-adjusted value over average) ÷ (League-average baseline)
A few details give DVOA its character. Successful plays count for more than the raw yardage alone, so consistently moving the chains is rewarded. There is diminishing credit for huge, garbage-time gains. And the opponent adjustment means a modest day against a great defense can grade out better than a flashy day against a weak one.
DVOA is reported as a single overall team number, but it is built from three independent pieces. Total team DVOA combines them:
Splitting the units this way is one of DVOA's biggest practical strengths. A team can have an elite offense dragged down by a leaky defense, and the combined record alone would hide that. The splits let you see where a team's value is actually coming from - which is exactly the information you need when projecting how the team might hold up if its strengths or weaknesses change.
DVOA has a sibling that often confuses newcomers: DYAR (Defense-adjusted Yards Above Replacement). The distinction is the same as batting average versus total bases in baseball.
| Metric | Type | Best for answering |
|---|---|---|
| DVOA | Rate (efficiency, % over average) | "Who was the most efficient per play?" |
| DYAR | Cumulative (total value, vs. a replacement-level baseline) | "Who provided the most total value over the season?" |
A backup who plays three brilliant games can post a sky-high DVOA on tiny volume but a small DYAR. A workhorse starter with merely good efficiency over a full season can accumulate a huge DYAR. When comparing players, always check which one you are looking at - rate and counting stats answer different questions.
The numbers below are invented to show the mechanics - they are not real game data.
DVOA was created by Aaron Schatz and popularized through Football Outsiders in the early 2000s, back when public NFL analytics was still a fringe pursuit. It was one of the first metrics to insist that situation and opponent both mattered, and it helped move the conversation past raw yards and points. The Football Outsiders methodology has since moved to FTN, which continues to publish DVOA and DYAR. Its long history is part of why DVOA remains a common reference point in NFL analysis.
DVOA measures what already happened, efficiently and with opponent context. It is not engineered to be a pure predictor of the future, and a team's DVOA can shift as personnel and health change.
After a week or two, the opponent adjustment is leaning on opponents who themselves have tiny samples. Early-season DVOA can swing hard and should be read with caution.
The weights are proprietary and reflect modeling choices. Reasonable analysts can disagree with those choices, and you cannot audit them directly.
Always check the offense/defense/special-teams splits. A middling total can conceal one elite unit and one poor one - which matters enormously for matchups.
DVOA grades every play against a situation-specific league baseline, adjusts for opponent, and reports the result as a percentage above or below average - positive being good for offenses and negative good for defenses. Its great virtues are situational context, opponent adjustment, and clean offense/defense/special-teams splits; its main drawbacks are that the weights are proprietary, it is descriptive rather than predictive by design, and early-season figures are noisy. Read it alongside transparent, open-data metrics like EPA rather than treating any single number as the final word.
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