Game quality

What each result was worth beyond the score. Every play is graded by EPA (expected points added), then adjusted for who it came against: a defence's rating is what it allowed to everyone else that season, so a big day against a bad defence counts for less. Season views include playoff games.

Games

Adj margin = offence minus defence EPA per play after the opponent adjustment. Win exp = how often a team with that adjusted margin wins; a 55% win was a coin flip that landed. Win prob range = lowest and highest in-game chance, which is where blown leads and comebacks show.

TeamScorevs lineOff EPA/playraw → adj Def EPA/playraw → adjAdj marginWin exp Win prob rangeTurnoverslost / forced
WAS W 45–31 +22.5dog 8.5 +0.29 → +0.32 +0.08 → -0.04 +0.36 98%raw 95% 26% – 100% 0 / 5
@ DET L 31–45 -22.5fav 8.5 +0.08 → +0.03 +0.29 → +0.24 -0.21 9%raw 5% 0% – 74% 5 / 0
BAL L 25–27 -3.5fav 1.5 +0.18 → +0.19 +0.08 → -0.06 +0.25 94%raw 80% 3% – 63% 3 / 0
@ BUF W 27–25 +3.5dog 1.5 +0.08 → +0.13 +0.18 → +0.04 +0.09 74%raw 20% 37% – 97% 0 / 3
LA L 22–28 +1.0dog 7.0 -0.07 → -0.01 +0.08 → +0.00 -0.02 45%raw 11% 1% – 59% 2 / 0
@ PHI W 28–22 -1.0fav 7.0 +0.08 → +0.06 -0.07 → -0.09 +0.15 85%raw 89% 41% – 99% 0 / 2
HOU L 14–23 +0.5dog 9.5 +0.10 → +0.11 +0.04 → +0.00 +0.11 77%raw 70% 0% – 54% 0 / 0
@ KC W 23–14 -0.5fav 9.5 +0.04 → +0.09 +0.10 → +0.14 -0.05 37%raw 30% 46% – 100% 0 / 0

Quarterbacks this week

Click a column to sort. Schedule = what the opponent adjustment added (+ = faced a tough pass defence). Turnover and sack EPA are what those plays cost; sacks are shared with the line.

QuarterbackTeam Opp DropbacksAdj EPA/dbRaw EPA/dbScheduleTotal adj EPA INT / FLTurnover EPASacksSack EPAWPACPOE
Jayden Daniels WAS DET 31 +0.633 +0.618 +0.015 +19.6 0 / 0 +0.0 0 +0.0 +0.56 +6.2
Lamar Jackson BAL BUF 29 +0.149 +0.157 -0.009 +4.3 1 / 1 -10.8 2 -9.8 -0.17 +8.9
Matthew Stafford LA PHI 49 +0.117 +0.076 +0.041 +5.7 0 / 1 -4.4 5 -10.5 -0.11 -5.1
C.J. Stroud HOU KC 36 +0.045 +0.027 +0.018 +1.6 0 / 0 +0.0 8 -13.3 +0.01 +7.1
Patrick Mahomes KC HOU 28 +0.018 -0.019 +0.037 +0.5 0 / 0 +0.0 3 -4.5 +0.06 +0.3
Josh Allen BUF BAL 23 +0.014 -0.075 +0.089 +0.3 0 / 0 +0.0 1 -1.1 +0.03 +5.5
Jared Goff DET WAS 39 -0.135 -0.085 -0.050 -5.3 3 / 1 -19.0 2 -6.8 +0.05 -5.4
Jalen Hurts PHI LA 27 -0.189 -0.176 -0.012 -5.1 0 / 0 +0.0 7 -11.9 -0.24 +4.6
Opponent adjustment. A unit's rating for a game is its average over its other games that season, blended with 16 games' worth of prior (league average plus half of last season's gap from it; 24 games for pass defence, which is noisier). Early in a season that leans on last year; by midseason it is mostly this year. Chosen by how well it predicts a held-out game: it cut that error by about a quarter against no shrinkage, and adjusted numbers agree between odd and even weeks more than raw ones do (team EPA margin r 0.52 → 0.55, defence 0.32 → 0.36, QB EPA/dropback 0.47 → 0.49, 2016–2025).
Win expectancy is a logistic fit of wins on EPA margin over 6,036 completed games (it names the winner 86.5% of the time). These describe what happened; one game is not a forecast. Play-by-play credits the quarterback with every sack and dropback, so a bad line shows up in his numbers. Seasons 2016–2026, built 2026-09-14 01:25 UTC, from nflverse. Write-up: backtests/nfl_game_quality/FINDINGS.md.