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.

Jacoby Brissett — 2022

Adj EPA / dropback
+0.056
Raw EPA / dropback
+0.048
Dropbacks
391
Turnover EPA
-28.2
WPA
+0.00
WeekOpp DropbacksAdj EPA/dbRaw EPA/dbScheduleTotal adj EPA INT / FLTurnover EPASacksSack EPAWPACPOE
1CAR 33 -0.231 -0.222 -0.009 -7.6 0 / 0 +0.0 1 -1.4 +0.07 -2.9
2NYJ 28 +0.486 +0.495 -0.009 +13.6 1 / 0 -0.7 1 -1.1 +0.10 +15.0
3PIT 33 +0.018 +0.044 -0.026 +0.6 0 / 0 +0.0 2 -4.2 -0.07 -0.8
4ATL 36 -0.108 -0.028 -0.080 -3.9 1 / 0 -0.8 1 -1.1 -0.41 -5.5
5LAC 34 +0.231 +0.206 +0.025 +7.8 1 / 0 -4.2 0 +0.0 -0.07 +4.2
6NE 50 -0.170 -0.232 +0.062 -8.5 2 / 1 -13.9 4 -11.1 -0.24 -9.1
7BAL 32 -0.023 +0.015 -0.038 -0.7 0 / 1 -4.5 5 -8.8 -0.01 +17.5
8CIN 23 +0.634 +0.608 +0.027 +14.6 0 / 1 -3.9 2 -4.8 +0.11 +25.7
10MIA 38 -0.149 -0.158 +0.009 -5.7 0 / 0 +0.0 3 -6.8 -0.06 +0.8
11BUF 42 +0.501 +0.423 +0.078 +21.0 0 / 0 +0.0 1 -2.2 +0.34 +5.8
12TB 41 -0.134 -0.141 +0.007 -5.5 1 / 0 -0.1 4 -6.3 +0.35 +0.3
14CIN 1 -3.914 -3.930 +0.015 -3.9 0 / 0 +0.0 0 +0.0 -0.11 -31.5
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.