What Is a Completions Prop?

A completions prop is a bet on how many passes a quarterback completes in one game, posted as an over/under. Lines usually sit in the high teens to mid twenties. League wide in 2025, teams averaged 20.6 completions per game on 32.1 attempts, a 64.3 percent completion rate.

How the market is posted

The bet is a player total. A book sets a number of completions, you take the over or the under, and the price on each side carries the book's margin. Lines are usually posted at a half point, so there is no push: 21 completions clears a 20.5 line and loses a 21.5 line. Unlike a touchdown market, this is a high count stat, so a single play rarely decides the ticket. Twenty or so events accumulate over four quarters, which makes the number more projectable and the outcome less lottery like.

That projectability cuts both ways. It means a good process gets rewarded more consistently here than in scoring markets, and it also means the books are rarely far off. The edge in a completions prop comes from being right about attempts, not from finding a mispriced quarterback.

What a normal number actually looks like

Pro Football Reference's league averages per team game put the 2025 baseline at 20.6 completions on 32.1 attempts, a 64.3 percent completion rate and 10.2 yards per completion. League wide that came to 11,217 completions on 17,439 attempts across 544 team games.

The trend matters more than the single number, because passing volume has been falling:

• 2023: 21.7 completions on 33.7 attempts per team game, 64.5 percent
• 2024: 21.4 completions on 32.7 attempts per team game, 65.3 percent
• 2025: 20.6 completions on 32.1 attempts per team game, 64.3 percent

Completions per team game dropped more than a full completion in two seasons, and almost all of that came from fewer attempts rather than worse accuracy. Anyone carrying a mental baseline from a few years ago is running about one completion hot on every projection they make.

Completions are attempts times completion rate, and one of those matters much more

There are only two inputs. A quarterback completes passes at some rate, and he gets some number of chances. The trap is assuming the accurate quarterback is the one who clears the number. 2025 says otherwise.

Drake Maye led all qualified passers at 72.0 percent, the best mark in the league. He completed 354 passes in 17 games, which is 20.8 per game, essentially league average, because he only threw 492 times. Bo Nix completed just 63.4 percent, below the league rate, and averaged 22.8 completions a game, because he led the NFL with 612 attempts. The less accurate quarterback was the better completions bet by nearly two per game.

Josh Allen is the sharper version of the same lesson. He completed 69.3 percent in 2025, second among qualifiers, and finished with 319 completions in 17 games. That is 18.8 per game, below the league average of 20.6, because Buffalo only put the ball up 460 times. An elite quarterback can be a systematic under in this market.

The completions leaderboard is a volume leaderboard. Dak Prescott led the league with 404 completions (600 attempts, 67.3 percent), Jared Goff had 393 on 578, and Matthew Stafford and Bo Nix tied at 388 on 597 and 612 respectively. Three of those four were top four in attempts.

The arithmetic that should anchor every projection

Work backwards from the line. A quarterback at the 64.3 percent league rate needs roughly 32 attempts to reach 20.5 completions. At Maye's 72.0 percent, the same number takes about 29 attempts. At Caleb Williams's 58.1 percent, it takes about 36.

Read that spread carefully. A 14 point swing in completion percentage, which is close to the entire range from the league's most accurate qualifier to its least, moves the required attempts by about seven. But attempts themselves routinely swing more than seven game to game on game script alone. That is why the noise in this market lives in the attempt column, and why projecting attempts well is the whole job.

What actually moves a completions projection

• Game script, first and hardest. Trailing teams throw. A team down 14 in the third quarter can add ten attempts to a projection that looked reasonable at kickoff. Underdogs are structurally better completions bets than the spread alone suggests.
• Team pace and total plays. More snaps means more of everything. A fast, no huddle offense in a high total game creates attempts that a grinding offense never generates.
• Average depth of target. Short, quick game offenses convert attempts into completions at a much higher clip. A checkdown heavy quarterback can clear a number that a downfield thrower with the same attempts misses.
• The run game and the opponent's run defense. A team that can run efficiently against this specific front will run, and every handoff is an attempt that never happens.
• Weather and wind. Wind suppresses both attempts and completion rate, and it is the one input that hits both terms of the equation at once.
• Backup and injury context. A backup often gets a conservative, short passing plan, which can raise completion rate while lowering attempts. Do not assume the direction.
• Form the number before you look at the price. Otherwise the posted line anchors your projection and you will talk yourself into agreeing with it.

Where the market misleads

Completions are not passing yards. A quarterback can complete 25 short passes for 190 yards, or 16 downfield throws for 300. Yardage rewards depth, completions reward frequency, and the two come apart every week. The passing yards prop is a genuinely different question about the same player, and betting them as if they move together is a common way to lose both.

Accuracy is not the edge you think it is. Completion percentage is stable and widely known, so it is already in the price. Attempt projection is where the disagreement lives.

Sacks and scrambles quietly eat attempts. A quarterback who takes four sacks and runs five times has given up nine plays that could have been attempts. In 2025 teams averaged 2.4 sacks allowed per game, and against a strong pass rush that number goes up.

Blowouts kill both sides for different reasons. A team leading by 21 stops throwing, and a team trailing by 28 in garbage time often runs the clock out too. The over needs the game to stay competitive, not just to be high scoring.

The league is throwing less. Attempts have fallen three seasons running. If your priors were formed in 2022, recalibrate them before you take another over.

How BetLogic helps

Our NFL QB passing sheet carries pass attempts per game alongside projected passing yards, projected passing touchdowns and the Vegas derived team implied total, which are the inputs a completions projection is actually built from: attempts drive the volume, the implied total tells you whether the game script is likely to produce more of them, and the projection blend is dampened toward per game form rather than chasing one loud week. Pair the attempts column with the quarterback's season completion rate and you have a defensible number before you ever look at a posted line. If you want the broader map of what these markets are and how they price, start with the NFL player props overview, and the passing yards guide covers the market this one is most often confused with.

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.