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.

Josh Allen — 2026 Every split →

Adj EPA / dropback
+0.315
Raw EPA / dropback
+0.285
Dropbacks
186
Turnover EPA
-12.9
WPA
+1.59
WeekOpp DropbacksAdj EPA/dbRaw EPA/dbScheduleTotal adj EPA INT / FLTurnover EPASacksSack EPAWPACPOE
1HOU 32 +0.550 +0.454 +0.096 +17.6 0 / 0 +0.0 2 -3.3 +0.65 +8.1
2DET 33 +0.448 +0.456 -0.008 +14.8 0 / 0 +0.0 2 -1.8 +0.14 +5.7
3LAC 30 +0.048 -0.014 +0.062 +1.4 2 / 1 -10.0 4 -9.1 -0.06 -0.9
4NE 35 +0.179 +0.137 +0.042 +6.3 1 / 0 -1.7 1 -1.1 -0.01 +10.3
5LA 21 +0.445 +0.399 +0.046 +9.3 1 / 0 -1.2 1 -1.9 +0.41 -1.4
6LV 35 +0.260 +0.305 -0.045 +9.1 0 / 0 +0.0 2 -3.5 +0.46 +5.7
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 2026-10-28 11:05 UTC, from nflverse. Write-up: backtests/nfl_game_quality/FINDINGS.md.