Passing yards is the most heavily bet quarterback prop. It looks simple: a quarterback averages 250 yards, the line is 239.5, so the over must be the play.
But passing yards depend on things the season average hides. A quarterback can throw for 320 in a shootout and 170 the next week in a game his team led from the first quarter. This guide covers what the line is really pricing, what moves it, and how to compare it across books.
What the line is pricing
A passing yards line comes down to two numbers multiplied together:
- Attempts. How many times he'll throw.
- Yards per attempt. How much each throw gains, which depends on his receivers, his protection, the defense and how far downfield he's asked to throw.
Most edges come from one of those having changed while the line hasn't caught up.
1. Attempts come from game script
Nothing moves passing volume like the scoreboard.
- Teams that fall behind throw more. A quarterback trailing in the second half can pile up attempts, and yards, even in a loss.
- Teams with a big lead run the ball. A quarterback whose team is up three scores may barely throw after halftime.
- The spread and total tell you what the book expects. A big underdog in a high-total game is set up for volume. A big favorite in a low-total game is the opposite.
That's why the same quarterback can carry very different lines week to week. Before a passing yards bet, check the spread and total, and ask what happens to his attempts if the game goes against the script.
2. Pace and play calling
Some offenses run more plays than others, and some throw more of them. A fast, pass-heavy offense gives its quarterback more chances every week. A slow, run-first offense caps his ceiling even when he plays well.
Coaching changes matter here. A new play caller can change a quarterback's volume overnight, and early-season lines may still reflect last year's offense.
3. Receivers and protection
Yards per attempt depends on the people around him.
- A missing top receiver usually lowers a quarterback's efficiency, not just that receiver's numbers. Fewer big plays means fewer yards per throw.
- Injuries on the offensive line can matter even more. A quarterback under pressure throws quicker, shorter passes and takes more sacks, and sack yardage comes off passing yards.
- A returning star works the other way and can lift a line that was set without him.
Betravon's player pages list teammates on the injury report by position, so a missing receiver or lineman is easy to spot.
4. The defense
Some defenses are easy to throw on and hard to run on, which pushes opponents toward the pass. Others take away the deep ball and force short throws. A tough pass defense lowers yards per attempt, but it can also lead to more attempts if the offense can't run either. Read the matchup in both directions.
5. Weather
Wind is the weather that matters most for passing. Strong wind cuts down deep passes and can lower yardage for both quarterbacks. Rain and cold matter less than people expect. Indoor games remove the question.
The backup quarterback problem
When a starter is ruled out, books post lines for the backup, often quickly and with little history to go on. Backups often throw shorter and get pulled from aggressive game plans. Sometimes the line is too high for that. Sometimes the market overreacts the other way. Either way, a backup's line deserves more care than a starter's.
The same goes for the starter's receivers: a backup quarterback can lower a deep threat's ceiling sharply.
Why one long completion matters
Like receiving yards, passing yards are lopsided. Most games land near the middle, but a long touchdown or two can push a game far above it. A quarterback's average is usually a little higher than his typical game.
Books know this, and lines tend to sit closer to the typical game. That's why a line can look low next to the season average and still be fair.
Comparing books
Passing yards lines often differ by several yards from one book to the next, and the prices differ too. A half-yard rarely matters for passing yards, but five or ten yards can. Shop the line and the price together: a lower line at a worse price may still be the better bet, and no-vig fair odds show how to compare them.
On pick'em apps like PrizePicks and Underdog, there's one line and no price. When the app's line sits well below the books and the books lean over, the app's over is the better side.
A short checklist
- Check the spread and total for expected game script.
- Know the offense's pace and how often it throws.
- Check the injury report for receivers and linemen.
- Read the defense: does it push teams toward the pass or away from it?
- Check the wind.
- Be careful with backups.
- Compare the line and price across books.
Betravon puts every book's passing yards line and price for each quarterback side by side, with his recent games and tonight's matchup. See today's NFL passing yards props, or every NFL player prop.