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.

Jameis Winston — 2026 Every split →

Adj EPA / dropback
-0.180
Raw EPA / dropback
-0.116
Dropbacks
174
Turnover EPA
-26.0
WPA
-0.18
WeekOpp DropbacksAdj EPA/dbRaw EPA/dbScheduleTotal adj EPA INT / FLTurnover EPASacksSack EPAWPACPOE
2LA 29 -0.563 -0.569 +0.006 -16.3 1 / 0 -4.6 2 -1.8 -0.22 -25.3
3TEN 25 -0.330 -0.245 -0.085 -8.2 0 / 0 +0.0 3 -5.2 -0.05 -4.8
4ARI 34 +0.009 +0.114 -0.106 +0.3 2 / 0 -5.2 4 -4.8 +0.11 +1.3
5WAS 56 +0.096 +0.189 -0.092 +5.4 0 / 1 -5.2 2 -7.2 +0.08 -0.3
6NO 30 -0.415 -0.400 -0.014 -12.4 2 / 0 -11.0 4 -5.4 -0.11 -15.6
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 2026-10-28 11:05 UTC, from nflverse. Write-up: backtests/nfl_game_quality/FINDINGS.md.