PPG Model Backtest

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2025
All Seasons Accuracy
71.2%
3014 correct of 4234 games
Covers 20 seasons (current + historical).
Historical Accuracy
71.1%
2852 correct of 4011 games
Prior seasons: 19
Current Season Accuracy
72.6%
162 correct of 223 games
Settings
Start week: 4
Retroactive mode: On
Season: 2025
Confidence Buckets (Current + Historical)
Margin Band Games Hit Rate Avg Prob
0 – 5 140 50.0% 55.8%
5 – 10 116 44.0% 64.7%
10 – 20 305 52.1% 77.0%
20+ 3673 74.4% 98.4%
Probability Calibration (Current + Historical)
Predicted Range Games Avg Pred Actual Win %
50–59% 133 55.5% 51.9%
60–69% 132 64.8% 43.9%
70–79% 202 75.1% 53.5%
80–89% 276 85.4% 54.7%
90–100% 3491 99.0% 75.3%
Sample Game Outcomes
Week Matchup Predicted Winner Actual Winner Pred Prob Pred Margin Actual Margin
4 PHI vs TB PHI PHI 98.3% 48.47 6
4 LAC vs NYG LAC NYG 76.9% 14.41 -3
4 KC vs BLT KC KC 80.9% 17.29 17
4 ATL vs WAS ATL ATL 99.7% 70.18 7
4 CLV vs DET DET DET 100.0% -132.0 -24
4 CIN vs DEN DEN DEN 100.0% -102.29 -25
4 IND vs LA LA LA 100.0% -145.94 -7
4 MIA vs NYJ MIA MIA 100.0% 101.94 6
4 NE vs CAR NE NE 100.0% 194.71 29
4 LV vs CHI CHI CHI 100.0% -179.65 -1
4 NO vs BUF BUF BUF 100.0% -131.24 -12
4 ARZ vs SEA SEA SEA 100.0% -252.0 -3
4 PIT vs MIN PIT PIT 73.3% 12.12 3
4 JAX vs SF JAX JAX 97.2% 42.65 5
4 TEN vs HST HST HST 100.0% -246.47 -26
Showing up to 15 games. Historical accuracy uses current season strength ratings and does not yet replay week-by-week adjustments.
Historical Backtest Summary (2006–2024)
Season Games Accuracy
2024 224 75.0%
2023 224 64.3%
2022 222 71.2%
2021 223 70.4%
2020 208 72.1%
2019 208 69.7%
2018 208 74.0%
2017 209 74.2%
2016 206 70.4%
2015 208 68.8%
2014 207 72.5%
2013 207 71.0%
2012 207 72.9%
2011 208 72.6%
2010 208 70.7%
2009 208 71.2%
2008 208 68.8%
2007 208 73.1%
2006 210 68.6%
Covers 19 seasons spanning 2006–2024.