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.

Kirk Cousins — 2026 Every split →

Adj EPA / dropback
+0.156
Raw EPA / dropback
+0.143
Dropbacks
269
Turnover EPA
-19.8
WPA
+1.26
WeekOpp DropbacksAdj EPA/dbRaw EPA/dbScheduleTotal adj EPA INT / FLTurnover EPASacksSack EPAWPACPOE
1MIA 30 -0.110 +0.013 -0.123 -3.3 2 / 0 -9.3 0 +0.0 +0.16 +0.7
2LAC 31 +0.260 +0.193 +0.067 +8.0 1 / 0 -4.8 2 -2.4 +0.31 +2.9
3NO 38 +0.232 +0.236 -0.004 +8.8 0 / 0 +0.0 3 -4.1 +0.37 +8.6
4KC 50 +0.237 +0.196 +0.042 +11.9 1 / 0 -0.7 0 +0.0 +0.17 -3.0
5NE 31 +0.341 +0.297 +0.044 +10.6 0 / 0 +0.0 3 -3.1 +0.04 +0.4
6BUF 41 +0.301 +0.280 +0.021 +12.4 1 / 0 -5.0 0 +0.0 +0.42 -9.7
7LA 48 -0.134 -0.153 +0.019 -6.4 0 / 0 +0.0 2 -2.0 -0.20 -7.9
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 2026-10-28 11:05 UTC, from nflverse. Write-up: backtests/nfl_game_quality/FINDINGS.md.