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.

Tom Brady — 2022

Adj EPA / dropback
+0.083
Raw EPA / dropback
+0.069
Dropbacks
828
Turnover EPA
-56.7
WPA
+1.79
WeekOpp DropbacksAdj EPA/dbRaw EPA/dbScheduleTotal adj EPA INT / FLTurnover EPASacksSack EPAWPACPOE
1DAL 29 +0.126 +0.036 +0.090 +3.7 1 / 0 -4.4 2 -3.5 +0.11 +3.3
2NO 35 +0.145 +0.069 +0.076 +5.1 0 / 0 +0.0 1 -1.0 +0.45 -13.1
3GB 46 +0.023 +0.003 +0.020 +1.1 0 / 0 +0.0 3 -4.7 -0.30 +4.9
4KC 53 +0.174 +0.179 -0.006 +9.2 0 / 1 -5.8 1 -5.8 -0.06 +6.0
5ATL 53 +0.191 +0.265 -0.074 +10.1 0 / 0 +0.0 0 +0.0 +0.39 +0.7
6PIT 42 +0.164 +0.187 -0.023 +6.9 0 / 0 +0.0 2 -2.3 +0.07 +0.8
7CAR 50 -0.053 -0.048 -0.005 -2.6 0 / 0 +0.0 1 -1.8 -0.06 -1.9
8BAL 46 +0.082 +0.118 -0.036 +3.8 0 / 0 +0.0 3 -3.1 -0.02 -4.5
9LA 58 -0.075 -0.080 +0.005 -4.4 0 / 0 +0.0 1 -3.9 +0.25 -5.4
10SEA 29 +0.496 +0.528 -0.032 +14.4 1 / 0 -4.2 0 +0.0 +0.29 +10.4
12CLE 46 -0.000 -0.037 +0.037 -0.0 0 / 0 +0.0 3 -3.1 -0.20 +1.6
13NO 55 +0.082 +0.008 +0.074 +4.5 1 / 0 -4.6 1 -1.4 +0.47 -2.0
14SF 55 -0.140 -0.172 +0.032 -7.7 2 / 0 -10.6 0 +0.0 -0.09 -1.4
15CIN 46 +0.117 +0.098 +0.019 +5.4 2 / 1 -12.6 1 -4.8 -0.03 +5.5
16ARI 48 -0.054 -0.039 -0.015 -2.6 2 / 0 -8.8 0 +0.0 +0.19 -6.7
17CAR 50 +0.354 +0.349 +0.005 +17.7 0 / 0 +0.0 3 -5.9 +0.53 +12.2
18ATL 17 +0.094 +0.176 -0.082 +1.6 0 / 0 +0.0 0 +0.0 -0.00 +6.8
19DAL 70 +0.037 -0.051 +0.088 +2.6 1 / 0 -5.7 2 -3.7 -0.19 -13.0
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.