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 — 2023

Adj EPA / dropback
+0.164
Raw EPA / dropback
+0.150
Dropbacks
675
Turnover EPA
-54.5
WPA
+2.65
WeekOpp DropbacksAdj EPA/dbRaw EPA/dbScheduleTotal adj EPA INT / FLTurnover EPASacksSack EPAWPACPOE
1NYJ 45 +0.055 -0.031 +0.086 +2.5 3 / 0 -6.9 5 -5.7 -0.08 +7.8
2LV 39 +0.318 +0.339 -0.021 +12.4 0 / 0 +0.0 2 -3.1 +0.12 +15.1
3WAS 32 +0.105 +0.163 -0.058 +3.4 1 / 0 -0.9 0 +0.0 +0.13 -3.1
4MIA 27 +0.814 +0.822 -0.008 +22.0 0 / 0 +0.0 2 -2.5 +0.43 +19.3
5JAX 41 +0.343 +0.341 +0.002 +14.1 1 / 0 +0.2 0 +0.0 +0.21 +13.4
6NYG 30 +0.040 +0.040 +0.000 +1.2 1 / 0 -4.2 0 +0.0 +0.06 -2.2
7NE 42 +0.245 +0.204 +0.040 +10.3 1 / 0 -3.9 1 -1.2 +0.18 +6.7
8TB 42 +0.017 +0.043 -0.026 +0.7 1 / 0 -5.5 2 -3.2 +0.17 +10.1
9CIN 40 +0.105 +0.116 -0.011 +4.2 1 / 0 -3.4 1 -1.6 -0.08 +12.6
10DEN 27 -0.171 -0.148 -0.023 -4.6 2 / 0 -6.0 0 +0.0 -0.23 -5.3
11NYJ 33 +0.457 +0.364 +0.094 +15.1 1 / 0 -0.1 1 -2.6 +0.08 -3.4
12PHI 52 +0.156 +0.147 +0.009 +8.1 1 / 0 -5.0 1 -1.1 +0.62 -4.2
14KC 44 +0.013 -0.045 +0.058 +0.6 1 / 0 -3.0 3 -4.7 -0.13 -1.4
15DAL 16 +0.004 -0.029 +0.032 +0.1 0 / 0 +0.0 1 -1.5 -0.02 -10.2
16LAC 22 +0.454 +0.456 -0.003 +10.0 1 / 0 -2.4 1 -1.4 +0.45 +8.0
17NE 31 -0.128 -0.160 +0.032 -4.0 1 / 0 -2.3 1 -2.4 -0.02 -6.9
18MIA 41 +0.074 +0.096 -0.022 +3.1 2 / 1 -11.1 3 -7.5 +0.33 +18.2
19PIT 32 +0.112 +0.115 -0.003 +3.6 0 / 0 +0.0 2 -2.6 +0.10 +0.5
20KC 39 +0.212 +0.148 +0.064 +8.3 0 / 0 +0.0 0 +0.0 +0.35 -0.5
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.