Air Yards, aDOT, and YAC: Decomposing Receiving Production

Receiving Yards Hide Two Very Different Skills

"He had 90 yards" tells you almost nothing about how a receiver got there. Did the ball travel 50 yards in the air and he ran the last 40? Did he catch a screen at the line and break tackles for the whole thing? Those are two completely different players with two completely different roles - yet the box score gives them the same line. Decomposing receiving production into air yards and yards after catch separates the deep threat from the YAC merchant, and a handful of opportunity metrics tell you how big a slice of the offense each player commands.

The core split: every receiving yard is either an air yard (distance the ball traveled past the line to the target point) or a yard after catch (gained by the receiver with the ball in his hands). The mix reveals the player's role.

The Building Blocks

Term	What it measures
Air yards	How far the ball travels past the line of scrimmage to the target point (charted on the throw, whether or not it is caught).
aDOT (average depth of target)	Air yards divided by targets - the typical distance downfield a player is thrown to.
YAC (yards after catch)	Yards gained by the receiver after securing the ball.
Target share	A player's share of his team's total targets.
Air-yards share	A player's share of his team's total air yards - captures who gets the high-value downfield looks.

Key subtlety: air yards accrue on incompletions too. If a quarterback launches a 40-yard incomplete pass to a receiver, that receiver is credited with 40 air yards even though no receiving yards were gained. Air yards is therefore an opportunity metric - it measures the looks a player draws, not just what he caught.

aDOT, and the WOPR

Average depth of target is a simple ratio that instantly classifies a receiver's role:

aDOT = Total Air Yards ÷ Total Targets

A low aDOT (short throws) points to a possession or screen-game role; a high aDOT points to a vertical, downfield role. But role is only half the story - you also want to know how central a player is to the offense. That is what the Weighted Opportunity Rating (WOPR) captures by blending target share and air-yards share. The standard nflfastR definition is:

WOPR = 1.5 × (Target Share) + 0.7 × (Air-Yards Share)

The weights reward volume and downfield usage together. A player who both sees a lot of targets and commands a big share of the team's air yards posts a high WOPR - the profile of a clear number-one option. One more useful ratio is RACR (Receiver Air Conversion Ratio), receiving yards divided by air yards, which captures how efficiently a player turns the air yards thrown his way into actual production.

Why WOPR matters for projection: opportunity is stickier than results. Touchdowns and long catches bounce around week to week, but a player's share of targets and air yards tends to be more stable - which makes WOPR a favorite input for fantasy and player-prop models.

Three Receiver Profiles

The same number of receiving yards can come from wildly different shapes. Here are three clearly hypothetical profiles to show what the metrics reveal:

Illustrative profiles (invented numbers)

The Deep Threat

High aDOT (~15+ yards)
Big air-yards share
Low YAC - yards come downfield
High WOPR driven by air yards

The YAC Merchant

Low aDOT (~5 yards)
Modest air-yards share
Most yardage after the catch
Volume-driven, scheme-dependent

The Volume Possession Target

Moderate aDOT (~9 yards)
Very high target share
Balanced air yards and YAC
Highest WOPR of the three

All three could finish a season with similar receiving yards. The decomposition tells you the deep threat is boom-or-bust, the YAC merchant depends on his quarterback and scheme to create space, and the possession target is the safest, most central piece of the passing game.

What Each Metric Is Good For

aDOT

Classifies role at a glance - vertical threat vs. underneath/possession. Pairs well with separation and accuracy metrics.

YAC

Highlights run-after-catch ability and how a scheme manufactures yards. High YAC can flatter a receiver whose quarterback and design create easy space.

WOPR & shares

Measure how central a player is to the offense. The stickiest, most projection-friendly opportunity signals.

Caveats and Limits

YAC is partly not the receiver's

A lot of YAC comes from scheme design and accurate, in-stride throws from the quarterback. High YAC is not purely a measure of the pass-catcher's elusiveness.

Air yards reward volume

Because air yards accumulate even on incompletions, a player on a pass-happy team who is targeted deep often can rack up air yards without efficient production. Check RACR alongside it.

Charting depends on the source

Air yards are charted to the target point, and small differences in how data providers chart throws can shift the numbers. Stay within one source when comparing.

Role can change mid-season

Injuries to other pass-catchers, scheme tweaks, or a quarterback change can reshape target and air-yards shares quickly. Recent usage often beats full-season averages.

The bottom line

Splitting receiving yards into air yards and YAC - and layering on aDOT, target share, air-yards share, WOPR (1.5 x target share + 0.7 x air-yards share), and RACR - turns a flat yardage total into a real profile: deep threat, YAC merchant, or central possession target. Because air yards accrue even on incompletions, they measure opportunity, and opportunity shares are stickier than results, which is why these metrics are so useful for projection. Just remember YAC is partly scheme and quarterback, and air yards reward volume, so read the pieces together rather than chasing any single number.