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Defensive yards allowed is the foundational measure of how well a defense limits the opposing offense's ability to gain yardage — and while it is one of the most traditional statistics in football, it is also one of the most misunderstood. In 2022, the San Francisco 49ers allowed only 311.3 yards per game, the fewest in the NFL, under defensive coordinator DeMeco Ryans. However, the New England Patriots ranked similarly in yards allowed but were a mediocre overall defense by other metrics, illustrating the important caveat that total yards allowed is heavily influenced by time of possession and field position — teams with dominant offenses can appear to have weak defenses simply because they give up the ball more often. Defensive yards allowed should always be contextualized with yards per play allowed, which removes the possession-frequency distortion. The Dallas Cowboys led the NFL in yards per play allowed in 2022 at just 4.8 yards per play — a more meaningful efficiency measure than total yards allowed. Pass yards allowed versus rush yards allowed tells the story of where a defense is strong and vulnerable: the Tampa Bay Buccaneers under Todd Bowles routinely had elite pass defenses (allowing the fewest passing yards per game) but were vulnerable against the run, reflecting their Tampa 2 coverage philosophy that prioritizes eliminating explosive passing plays. Understanding which aspect of the defense (pass, run, yards per play, total yards) to optimize requires knowing the opponent's offensive tendencies — if you're facing a run-heavy team, run yards allowed matters more; facing an air-raid offense, pass yards per play is the critical metric.
Defensive Yards Allowed per Game = Total Yards Allowed / Games Played Defensive Yards per Play Allowed = Total Yards Allowed / Total Opponent Plays Passing Yards Allowed per Game = Total Pass Yards Allowed / Games Played Rushing Yards Allowed per Game = Total Rush Yards Allowed / Games Played Yards per Play Allowed by Type: Pass YPA Allowed = Pass Yards Allowed / Pass Attempts Faced Rush YPC Allowed = Rush Yards Allowed / Rush Attempts Faced Defense Efficiency Index = (League Avg Yards per Play) / (Team Yards per Play Allowed) Index > 1.0 = Better than average; Index < 1.0 = Worse than average Worked Example — 49ers 2022 Defense: Total Yards Allowed: 5,312 (17 games) Total Opponent Plays: 1,001 Yards/Game: 5,312 / 17 = 312.5 Yards/Play: 5,312 / 1,001 = 5.31 League avg yards/play: 5.62 Efficiency Index = 5.62 / 5.31 = 1.058 → 5.8% better than average per play
- 1Gather the total yards allowed by the defense for the period — separated into passing yards allowed and rushing yards allowed — from NFL.com game stats, Pro Football Reference, or ESPN game summaries.
- 2Divide total yards by games played to get yards allowed per game, which is the standard comparison metric for league rankings and opponent analysis.
- 3Calculate yards per play allowed by dividing total yards by total opponent offensive plays (attempts + rushes) — this removes the time-of-possession distortion and gives a purer efficiency measure of defensive performance.
- 4Separate into passing and rushing components: passing yards allowed per game and rushing yards allowed per game reveal the specific strength and weakness profile of the defense, enabling game-plan targeting decisions.
- 5Compare yards per play allowed against the league average for the season to create a normalized efficiency index — this is the most reliable cross-season comparison because the league average changes year to year as offensive rules evolve.
- 6Supplement with opponent-adjusted metrics (like defensive DVOA from Football Outsiders) for the most accurate evaluation — raw yards allowed is influenced by the quality of offenses faced, and a defense that allowed fewer yards facing easy schedules may be weaker than one that allowed slightly more against elite offenses.
A defense allowing under 90 rush yards per game with a 3.45 yards-per-carry average is elite at stopping the run — these defenses force opponents to pass more frequently, which benefits pass rushers and cornerbacks.
A team that stops the run at an elite level but allows 271+ passing yards per game has a clear defensive identity conflict — the pass rush may be generating sacks but leaving the secondary exposed in coverage.
The 49ers' balanced defensive dominance — top-5 in both pass and rush yards allowed — reflects DeMeco Ryans' system that creates disguised coverages and pressures with 4-man fronts, making every facet of the attack difficult.
A team with a fast, high-scoring offense faces more defensive snaps when they score quickly — their defense allows 1,182 plays rather than the league average 1,020, inflating total and per-game yards while their per-play efficiency is actually strong.
Offensive coordinators study opponent defensive yards allowed by formation type (base vs. nickel vs. dime) to identify which personnel packages the defense is most vulnerable against, enabling targeted game-plan attacks on specific coverage weaknesses.
Fantasy football managers use opponent defensive yards allowed data by position (passing yards allowed to WRs, rushing yards allowed to RBs) to make favorable matchup-based start/sit decisions each week, helping analysts produce accurate results that support strategic planning, resource allocation, and performance benchmarking across organizations
Sportsbooks incorporate defensive yards allowed metrics into their team totals (over/under) modeling, specifically using yards per play allowed to project how many points a specific offensive matchup will generate, allowing professionals to quantify outcomes systematically and compare scenarios using reliable mathematical frameworks and established formulas
NFL head coaches and defensive coordinators evaluate weekly performance by yards per play allowed rather than total yards, using this per-play metric in film sessions to identify which specific plays and formations produced outsized yardage gains that need scheme corrections.
Prevent defense in the final minutes of games artificially inflates yards
Prevent defense in the final minutes of games artificially inflates yards allowed numbers — teams that are protecting leads commonly concede chunk yardage in the final two minutes because they prioritize preventing touchdowns over limiting yards, making end-of-game defensive statistics unrepresentative of full-game defensive quality. Professionals working with defensive yards allowed should be especially attentive to this scenario because it can lead to misleading results if not handled properly. Always verify boundary conditions and cross-check with independent methods when this case arises in practice.
Overtime defensive statistics create a statistical anomaly where teams that
Overtime defensive statistics create a statistical anomaly where teams that force overtime games appear to allow more total yards than those that win in regulation, simply because additional plays are run — always separate regulation and overtime yard totals when comparing across teams with different overtime game frequencies. Professionals working with defensive yards allowed should be especially attentive to this scenario because it can lead to misleading results if not handled properly. Always verify boundary conditions and cross-check with independent methods when this case arises in practice.
Weather conditions (extreme cold, heavy precipitation) systematically reduce
Weather conditions (extreme cold, heavy precipitation) systematically reduce yards per play in outdoor games, meaning defenses in cold-weather cities (Green Bay, Chicago, Cleveland, Buffalo) show artificially better yards-per-play metrics in home games that do not fully translate to neutral-site or dome evaluations. Professionals working with defensive yards allowed should be especially attentive to this scenario because it can lead to misleading results if not handled properly. Always verify boundary conditions and cross-check with independent methods when this case arises in practice.
| Team | Total Yards Allowed | YPG Allowed | Rush YPG | Pass YPG | Defensive Rank |
|---|---|---|---|---|---|
| San Francisco 49ers | 5,312 | 312.5 | 94.5 | 218.0 | 1st |
| New England Patriots | 5,328 | 313.4 | 115.2 | 198.2 | 2nd |
| Dallas Cowboys | 5,363 | 315.5 | 118.0 | 197.5 | 3rd |
| Baltimore Ravens | 5,584 | 328.5 | 120.3 | 208.2 | 4th |
| Minnesota Vikings | 6,481 | 381.2 | 147.4 | 233.8 | 24th |
| Houston Texans | 6,674 | 392.6 | 157.2 | 235.4 | 31st |
What is the NFL average yards allowed per game on defense?
The NFL average defensive yards allowed has risen from approximately 310 yards per game in the 1990s to around 340-360 yards per game in 2022, reflecting the league-wide shift toward more frequent and efficient passing offenses. Top defenses in the modern era allow under 300 yards per game, while poor defenses can allow 380-400+.
Is yards per game or yards per play a better defensive metric?
Yards per play allowed is significantly more meaningful for evaluating defensive quality because it removes the time-of-possession distortion. A defense that faces 1,100 opponent plays will allow more total and per-game yards than one facing 900 plays, even if they are equally effective per play. Yards per play isolates the defense's efficiency from their offense's pace.
How do you evaluate a pass defense vs. a run defense?
Separate passing yards allowed per game from rushing yards allowed per game, then compare each against position group benchmarks. Elite pass defenses allow under 215 pass yards per game; elite run defenses allow under 85 rush yards per game. These can diverge significantly — many teams have elite run defense but average pass defense (or vice versa) based on personnel and scheme.
What is a good defensive yards per play allowed in the NFL?
League average in recent seasons is approximately 5.5-5.7 yards per play. A defense allowing under 5.0 yards per play is elite — ranking in the top 2-3 teams in the NFL. Under 4.8 yards per play represents historically dominant defensive efficiency. Above 6.0 yards per play indicates a defense that is being consistently moved against on every play.
Does yards allowed include passing yards from sack losses?
This is source-dependent. In the NFL's official statistics, sack yards lost are counted as passing yards for the passer but do not reduce the yardage in team passing totals (sacks are tracked separately as part of team rushing stats in some older frameworks). Pro Football Reference counts sack yards lost in passing stats, while some sources exclude them — always check the methodology.
How does scheduling affect defensive yards allowed rankings?
Significantly — a defense that faces 8 games against top-5 offenses will allow more yards than an equivalent defense facing 8 games against bottom-5 offenses. This is why opponent-adjusted metrics like defensive DVOA are more accurate for evaluating true defensive quality. A defense allowing 340 yards per game against elite offenses may be better than one allowing 300 yards per game against weaker competition.
Which NFL teams have had the best defenses in history by yards allowed?
The 2000 Baltimore Ravens are widely considered the greatest single-season defense in NFL history, allowing only 10.3 points per game and dominating yards allowed metrics. The 1985 Chicago Bears, 2002 Tampa Bay Buccaneers, and 2015 Denver Broncos are also historically elite. In recent years, the 2022 San Francisco 49ers and 2020 Los Angeles Rams led the league in yards allowed per game.
Pro Tip
Combine defensive yards per play allowed with opponent EPA per play allowed for the most complete single-metric defensive efficiency picture. A defense that allows 5.1 yards per play and negative EPA per play is genuinely elite — it limits both raw yardage and the point-scoring value of each play. Defenses strong in yards but weaker in EPA often allow lots of short, high-value plays (third-down conversions) that the yards metric understates.
Did you know?
The 2000 Baltimore Ravens — the gold standard of modern defensive excellence — held opponents to 10.3 points per game over the entire season. Their most extraordinary statistical achievement: a four-game stretch in which they allowed a total of zero offensive touchdowns across 240 minutes of football, an unprecedented shutout run in the salary-cap era that many analysts believe may never be equaled in the modern pass-first NFL.
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