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.

Games

Adj margin = offence minus defence EPA per play after the opponent adjustment. Win exp = how often a team with that adjusted margin wins; a 55% win was a coin flip that landed. Win prob range = lowest and highest in-game chance, which is where blown leads and comebacks show.

TeamScorevs lineOff EPA/playraw → adj Def EPA/playraw → adjAdj marginWin exp Win prob rangeTurnoverslost / forced
NYG L 7–38 -23.0dog 8.0 -0.23 → -0.20 +0.34 → +0.27 -0.47 1%raw 0% 0% – 47% 1 / 0
@ PHI W 38–7 +23.0fav 8.0 +0.34 → +0.30 -0.23 → -0.22 +0.52 100%raw 100% 53% – 100% 0 / 1
CIN W 27–10 +23.0dog 6.0 +0.22 → +0.28 +0.01 → -0.09 +0.37 98%raw 95% 43% – 100% 0 / 1
@ BUF L 10–27 -23.0fav 6.0 +0.01 → +0.03 +0.22 → +0.17 -0.14 17%raw 5% 0% – 57% 1 / 0
DAL L 12–19 -3.5dog 3.5 -0.09 → -0.03 +0.01 → -0.05 +0.02 56%raw 21% 1% – 63% 2 / 0
@ SF W 19–12 +3.5fav 3.5 +0.01 → +0.08 -0.09 → -0.13 +0.21 91%raw 79% 37% – 99% 0 / 2
JAX L 20–27 +3.0dog 10.0 +0.07 → +0.06 +0.21 → +0.07 -0.00 49%raw 13% 0% – 44% 2 / 0
@ KC W 27–20 -3.0fav 10.0 +0.21 → +0.20 +0.07 → +0.08 +0.12 79%raw 87% 56% – 100% 0 / 2

Quarterbacks this week

Click a column to sort. Schedule = what the opponent adjustment added (+ = faced a tough pass defence). Turnover and sack EPA are what those plays cost; sacks are shared with the line.

QuarterbackTeam Opp DropbacksAdj EPA/dbRaw EPA/dbScheduleTotal adj EPA INT / FLTurnover EPASacksSack EPAWPACPOE
Joe Burrow CIN BUF 36 +0.408 +0.333 +0.075 +14.7 0 / 0 +0.0 1 -1.7 +0.32 +5.6
Patrick Mahomes KC JAX 30 +0.271 +0.323 -0.053 +8.1 0 / 0 +0.0 0 +0.0 +0.31 +9.8
Jalen Hurts PHI NYG 25 +0.235 +0.236 -0.001 +5.9 0 / 0 +0.0 1 -1.4 +0.21 -1.4
Brock Purdy SF DAL 31 +0.207 +0.116 +0.091 +6.4 0 / 0 +0.0 2 -3.3 +0.16 +4.7
Trevor Lawrence JAX KC 40 -0.000 +0.008 -0.008 -0.0 1 / 0 -2.4 2 -2.9 -0.15 -2.5
Josh Allen BUF CIN 43 -0.025 -0.041 +0.016 -1.1 1 / 0 -2.5 1 -1.3 -0.00 +1.1
Dak Prescott DAL SF 38 -0.131 -0.166 +0.035 -5.0 2 / 0 -9.1 1 -0.8 -0.27 -5.1
Daniel Jones NYG PHI 32 -0.415 -0.453 +0.038 -13.3 1 / 0 -5.6 5 -9.2 -0.13 -10.5
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.