Role-quality map: target share captures volume, air-yards captures depth. Players in the high-high quadrant tend to have the strongest ceiling/floor blend.
Air yards measure how far the ball travels in the air on a player's targets — the intent behind his usage. They reveal which receivers are trusted with the downfield, high-value work long before the catches and touchdowns show up in a box score.
Air yards count the distance from the line of scrimmage to where a target is thrown, whether or not it's caught. A receiver racking up air yards is being asked to do valuable things — win downfield, work the intermediate levels, operate in scoring range — and that role is stickier than the week-to-week catches it produces.
Two useful cousins live alongside raw air yards: air-yards share (the slice of a team's total downfield intent going to one player) and average depth of target (how far downfield he's used on a typical throw). Together they separate the true focal point of a passing game from the volume-only underneath option.
A high air-yards share is one of the strongest leading indicators of receiver value — the ball is heading his way in the parts of the field that produce fantasy points. When catches lag behind a big air-yards workload, it's often a buy signal: the touchdowns and yardage tend to follow sustained downfield volume.
Depth of target adds context to catch rate. A low catch rate on deep, high-air-yards targets isn't a red flag the way it would be on short throws — it's the cost of doing high-value business.