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.

Cam Ward — 2025

Adj EPA / dropback
-0.166
Raw EPA / dropback
-0.185
Dropbacks
592
Turnover EPA
-66.9
WPA
-2.05
WeekOpp DropbacksAdj EPA/dbRaw EPA/dbScheduleTotal adj EPA INT / FLTurnover EPASacksSack EPAWPACPOE
1DEN 34 -0.303 -0.394 +0.091 -10.3 0 / 1 -1.9 6 -9.7 -0.62 -12.6
2LA 38 -0.174 -0.177 +0.004 -6.6 0 / 1 -5.2 5 -11.0 -0.28 -4.8
3IND 42 -0.332 -0.298 -0.034 -14.0 1 / 0 -7.9 4 -5.6 -0.34 -1.4
4HOU 27 -0.509 -0.609 +0.100 -13.8 1 / 0 -5.6 2 -2.9 -0.17 -24.5
5ARI 41 -0.035 +0.039 -0.074 -1.4 1 / 0 +2.9 2 -4.6 +0.31 -9.6
6LV 43 -0.384 -0.340 -0.044 -16.5 1 / 2 -12.4 6 -16.7 -0.32 +5.5
7NE 39 -0.276 -0.301 +0.025 -10.8 1 / 1 -13.0 5 -16.7 -0.02 +6.7
8IND 41 -0.237 -0.204 -0.032 -9.7 1 / 0 -3.6 4 -8.2 +0.10 -7.2
9LAC 25 +0.004 -0.068 +0.072 +0.1 0 / 0 +0.0 4 -5.1 -0.07 -11.8
11HOU 40 +0.044 -0.068 +0.112 +1.7 0 / 1 -4.4 3 -7.8 -0.05 -2.0
12SEA 46 +0.122 +0.046 +0.075 +5.6 0 / 0 +0.0 4 -7.2 -0.13 +4.9
13JAX 41 -0.492 -0.498 +0.006 -20.2 0 / 0 +0.0 3 -4.8 -0.19 -1.7
14CLE 29 -0.248 -0.303 +0.055 -7.2 1 / 0 -7.0 1 -1.6 -0.19 -10.6
15SF 29 +0.021 +0.060 -0.039 +0.6 0 / 0 +0.0 0 +0.0 -0.01 -2.7
16KC 30 +0.244 +0.226 +0.018 +7.3 0 / 0 +0.0 2 -4.2 +0.11 +10.4
17NO 44 -0.176 -0.195 +0.020 -7.7 0 / 1 -8.8 4 -14.3 -0.32 -0.3
18JAX 3 +1.482 +1.478 +0.003 +4.4 0 / 0 +0.0 0 +0.0 +0.15 +30.0
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.