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.

Kyler Murray — 2022

Adj EPA / dropback
-0.048
Raw EPA / dropback
-0.041
Dropbacks
418
Turnover EPA
-25.7
WPA
-0.26
WeekOpp DropbacksAdj EPA/dbRaw EPA/dbScheduleTotal adj EPA INT / FLTurnover EPASacksSack EPAWPACPOE
1KC 38 -0.000 +0.009 -0.009 -0.0 0 / 0 +0.0 2 -5.3 -0.16 +1.1
2LV 51 -0.234 -0.154 -0.080 -11.9 1 / 0 -3.7 1 -2.0 +0.08 -5.6
3LA 60 -0.076 -0.081 +0.005 -4.6 0 / 0 +0.0 2 -3.8 -0.14 -5.5
4CAR 34 -0.049 -0.045 -0.004 -1.7 1 / 0 -7.2 1 -0.6 -0.14 +5.5
5PHI 41 +0.220 +0.168 +0.052 +9.0 1 / 0 -3.1 1 -1.9 +0.36 +1.8
6SEA 43 -0.318 -0.271 -0.046 -13.7 1 / 0 -0.5 6 -10.6 -0.32 +0.6
7NO 32 +0.167 +0.089 +0.077 +5.3 0 / 0 +0.0 2 -3.5 -0.01 -1.2
8MIN 48 -0.053 -0.042 -0.011 -2.5 2 / 0 -8.9 4 -5.8 +0.05 -1.4
9SEA 40 -0.234 -0.191 -0.043 -9.4 0 / 0 +0.0 5 -6.6 -0.01 +1.1
12LAC 30 +0.282 +0.256 +0.027 +8.5 1 / 0 -2.2 1 -1.1 +0.00 +0.2
14NE 1 +0.854 +0.796 +0.058 +0.9 0 / 0 +0.0 0 +0.0 +0.03 +16.1
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.