Blood in the streets in the town of New Haven "Peace Frog" - The Doors

Accuracy all seasons, every FINAL game scored on leakage-free pre-game predictions

Metric Baseline Book Closing Line
Spread MAE (n=31,046) 9.11 8.83
Winner % 71.3% 72.8%
Total MAE (n=31,046) 13.26 13.02
Log loss 0.5280 0.5251
Brier 0.1766 0.1771

Head-to-head on identical games: model spread MAE 9.11 vs book 8.79 over 30,884 games; taking the model against the closing spread hits 52.0% (52.4% is breakeven at −110). Full breakdowns on Compare Models. Not betting advice.

What it knows — the 27 inputs per game

Form & schedule (15)

home_win_pct_l5, home_avg_margin_l5, home_avg_total_l5, home_margin_stddev_l5, away_win_pct_l5, away_avg_margin_l5, away_avg_total_l5, away_margin_stddev_l5, home_games_played, away_games_played, home_days_rest, away_days_rest, season_week, is_neutral_site, is_conference_game

Ratings (12)

massey_beta_home, massey_beta_away, massey_beta_diff, massey_gamma_home, massey_gamma_away, massey_gamma_sum, bt_theta_home, bt_theta_away, bt_logodds, bt_theta_weighted_home, bt_theta_weighted_away, bt_logodds_weighted

Training

Trained
2026-07-10
Train seasons
Held-out test
Test spread RMSE
11.93
Test Brier
0.1882

Walk-forward (each season held out in turn)

SeasonSpread RMSEBrier
2022 11.73 0.1950
2023 11.64 0.1947
2024 11.65 0.1895
2025 11.77 0.1858
2026 11.95 0.1875

Calibration when it says 70%, does the home team win 70% of the time?