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.

Carson Wentz — 2025

Adj EPA / dropback
+0.072
Raw EPA / dropback
+0.034
Dropbacks
188
Turnover EPA
-21.9
WPA
-0.01
WeekOpp DropbacksAdj EPA/dbRaw EPA/dbScheduleTotal adj EPA INT / FLTurnover EPASacksSack EPAWPACPOE
3CIN 23 +0.350 +0.411 -0.061 +8.0 0 / 0 +0.0 3 -4.7 +0.04 +3.8
4PIT 52 +0.064 +0.063 +0.001 +3.3 2 / 0 -7.3 6 -8.7 -0.24 +5.2
5CLE 37 +0.304 +0.235 +0.069 +11.3 0 / 0 +0.0 3 -4.2 +0.53 +6.9
7PHI 44 +0.036 -0.052 +0.087 +1.6 2 / 0 -9.4 2 -3.1 -0.22 -0.5
8LAC 32 -0.333 -0.398 +0.065 -10.7 1 / 0 -5.3 5 -6.9 -0.12 -12.4
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.