PPG Model Backtest

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2025
All Seasons Accuracy
71.1%
2979 correct of 4187 games
Covers 20 seasons (current + historical).
Historical Accuracy
71.1%
2852 correct of 4011 games
Prior seasons: 19
Current Season Accuracy
72.2%
127 correct of 176 games
Settings
Start week: 4
Retroactive mode: On
Season: 2025
Confidence Buckets (Current + Historical)
Margin Band Games Hit Rate Avg Prob
0 – 5 138 51.4% 55.8%
5 – 10 115 42.6% 64.7%
10 – 20 299 52.2% 77.0%
20+ 3635 74.4% 98.4%
Probability Calibration (Current + Historical)
Predicted Range Games Avg Pred Actual Win %
50–59% 131 55.6% 53.4%
60–69% 131 64.8% 42.7%
70–79% 196 75.0% 54.1%
80–89% 276 85.4% 53.3%
90–100% 3453 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 95.3% 36.1 6
4 LAC vs NYG LAC NYG 93.2% 31.43 -3
4 KC vs BLT KC KC 99.9% 90.32 17
4 ATL vs WAS ATL ATL 98.8% 53.07 7
4 CLV vs DET DET DET 100.0% -146.82 -24
4 CIN vs DEN DEN DEN 100.0% -104.14 -25
4 IND vs LA LA LA 100.0% -126.04 -7
4 MIA vs NYJ MIA MIA 99.9% 82.64 6
4 NE vs CAR NE NE 100.0% 125.18 29
4 LV vs CHI CHI CHI 100.0% -134.79 -1
4 NO vs BUF BUF BUF 100.0% -115.9 -12
4 ARZ vs SEA SEA SEA 100.0% -177.31 -3
4 PIT vs MIN PIT PIT 95.1% 35.57 3
4 JAX vs SF JAX JAX 96.2% 38.76 5
4 TEN vs HST HST HST 100.0% -223.36 -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.