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.

Jalen Hurts — 2023

Adj EPA / dropback
+0.100
Raw EPA / dropback
+0.097
Dropbacks
613
Turnover EPA
-68.6
WPA
+0.75
WeekOpp DropbacksAdj EPA/dbRaw EPA/dbScheduleTotal adj EPA INT / FLTurnover EPASacksSack EPAWPACPOE
1NE 36 -0.102 -0.135 +0.033 -3.7 0 / 0 +0.0 3 -3.7 -0.28 +8.1
2MIN 27 +0.027 +0.041 -0.014 +0.7 1 / 0 -2.2 4 -4.8 -0.08 +13.3
3TB 38 +0.020 +0.046 -0.026 +0.8 2 / 0 -8.1 1 -2.1 +0.03 +1.7
4WAS 40 +0.204 +0.264 -0.060 +8.1 0 / 0 +0.0 3 -3.0 +0.43 +10.5
5LA 39 +0.186 +0.200 -0.014 +7.2 1 / 0 -6.2 1 -1.2 +0.27 +3.9
6NYJ 47 -0.056 -0.138 +0.083 -2.6 3 / 0 -14.8 2 -2.6 -0.71 -3.0
7MIA 34 +0.041 +0.064 -0.023 +1.4 1 / 1 -12.9 3 -6.6 +0.04 +10.2
8WAS 40 +0.539 +0.590 -0.051 +21.6 0 / 0 +0.0 2 -1.8 +0.75 +15.3
9DAL 26 +0.363 +0.324 +0.039 +9.4 0 / 0 +0.0 3 -3.8 +0.26 +14.8
11KC 27 -0.071 -0.126 +0.056 -1.9 1 / 0 -3.5 5 -5.5 +0.05 -4.7
12BUF 33 +0.039 +0.003 +0.037 +1.3 1 / 0 -4.6 2 -2.5 +0.20 -4.9
13SF 49 +0.262 +0.190 +0.072 +12.9 0 / 0 +0.0 3 -5.0 +0.10 +3.6
14DAL 28 +0.128 +0.091 +0.037 +3.6 0 / 0 +0.0 1 -1.1 -0.07 -0.8
15SEA 31 +0.007 +0.055 -0.048 +0.2 2 / 0 -4.0 0 +0.0 -0.11 -8.0
16NYG 39 +0.191 +0.189 +0.002 +7.5 1 / 0 -10.2 1 -1.5 +0.13 -3.8
17ARI 23 +0.428 +0.502 -0.074 +9.8 1 / 0 -0.4 0 +0.0 +0.18 +17.7
18NYG 18 -0.615 -0.604 -0.011 -11.1 1 / 0 -1.8 2 -3.8 -0.41 -8.0
19TB 38 -0.111 -0.081 -0.030 -4.2 0 / 0 +0.0 3 -3.6 -0.04 +9.6
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.