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.

Gardner Minshew — 2024

Adj EPA / dropback
-0.124
Raw EPA / dropback
-0.137
Dropbacks
333
Turnover EPA
-69.6
WPA
-1.33
WeekOpp DropbacksAdj EPA/dbRaw EPA/dbScheduleTotal adj EPA INT / FLTurnover EPASacksSack EPAWPACPOE
1LAC 37 -0.016 -0.034 +0.018 -0.6 1 / 1 -10.9 4 -11.4 +0.10 +1.0
2BAL 43 +0.034 -0.056 +0.090 +1.5 1 / 0 -3.4 5 -8.8 -0.13 +15.9
3CAR 31 -0.194 -0.139 -0.056 -6.0 1 / 0 -5.1 2 -2.0 -0.11 -6.5
4CLE 26 -0.098 -0.145 +0.047 -2.6 0 / 0 +0.0 2 -3.1 -0.23 -13.7
5DEN 19 -0.537 -0.545 +0.008 -10.2 2 / 0 -15.1 2 -2.9 -0.22 +4.5
7LA 36 -0.665 -0.643 -0.022 -23.9 3 / 1 -18.9 2 -9.6 -0.57 -14.3
8KC 33 +0.227 +0.207 +0.020 +7.5 0 / 1 -5.5 5 -11.9 +0.02 +17.1
9CIN 18 +0.028 +0.053 -0.025 +0.5 0 / 0 +0.0 1 -1.3 +0.05 +1.0
11MIA 46 +0.116 +0.107 +0.009 +5.3 1 / 0 -4.5 3 -4.9 +0.10 +2.0
12DEN 44 -0.290 -0.299 +0.009 -12.8 1 / 0 -6.3 3 -2.9 -0.34 -5.6
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.