How to Bet QB Passing Yards Props

A passing yards prop is an over/under on how many yards a quarterback throws for in a game, typically priced around minus 110 on each side. The line is driven mostly by expected pass attempts, which come from the game's projected script: teams that are trailing throw more, and teams in high-scoring games throw more.

Attempts first, efficiency second

Passing yards are attempts multiplied by yards per attempt. Bettors spend most of their time on the second term and most of the predictable variation is in the first. Yards per attempt is noisy and regresses hard; a quarterback averaging 8.5 one month is often at 7.0 the next. Attempts are far more stable, because they come from how a coach calls games and from the situation the game puts him in.

So the first questions are: how many plays will this team run, and what share will be passes. A team implied for 27 points in a game with a 50-point total will throw more than a team implied for 17 in a 38-point game. A team that is a seven-point underdog will throw more in the second half than a seven-point favourite.

What moves the line

The game total and the spread do most of it, which is why the prop moves when the game line moves. Beyond that, three things matter.

Pace. Teams that snap the ball quickly run more plays, and more plays means more attempts. A game between two fast teams supports both quarterbacks going over.

The opposing defense. Pass yards allowed per game is the obvious input and it needs care, because it is partly a function of game script. Bad teams trail, opponents run out the clock, and their pass defense looks better than it is. A defense that has faced few pass attempts is not necessarily good against the pass.

Pass rush. Sacks kill drives and subtract attempts. A quarterback facing a heavy rush with a shaky line loses attempts on top of the yards lost.

Common traps

The biggest one is betting an over on a heavy favourite. It is intuitive that a good offense throws for a lot, and it is often wrong, because a team leading by three scores in the fourth quarter stops throwing. Blowouts in either direction can wreck an over: the winner runs, and the loser may be down to a backup.

The second is treating a single big game as a trend. Quarterback game logs are extremely volatile, and a 380-yard game is usually one broken coverage away from a 280-yard game.

The third is stale lines on a moving injury. When a top receiver is ruled out, the passing prop often moves less than it should relative to that receiver's own prop.

Where our numbers come from

The projection on the QB sheet starts from per-game passing yards, then applies a dampened adjustment for what the opposing defense allows to quarterbacks and for the team's implied total. Dampened is the operative word: applying the matchup adjustment at full strength made the projections measurably worse in testing than not applying it at all, because defensive rankings carry a lot of noise. Where a sportsbook line exists, the sheet shows the gap between our projection and that line rather than asking you to eyeball it.

BetLogic provides data-driven insights only and does not constitute financial or gambling advice. Please bet responsibly and only what you can afford to lose. You must be of legal betting age in your jurisdiction.