Referee Explorer
Explore how referee assignments have historically been associated with team foul rates, adjusted for the team and game context included in the model. Descriptive, not predictive.
Multi-season estimate and each certified annual result, side by side.·Blue = fewer associated team fouls; red = more. Neither measures referee quality or predicts the next game.
All seasons
About these tendencies
Overall Tendency
A historical assignment-associated tendency in team fouls per 100 possessions, relative to that season’s reference. The estimate accounts for co-referees and the model’s included game-context terms.
Qualification and reliability
A season needs 12 games to qualify. NQ means not qualified; its numeric tendency and percentile are withheld. Statistical reliability is the saved season-specific label, separate from games and qualification.
Multi-season Tendency
A games-weighted mean of qualified-season tendencies from 2023-24 to 2025-26. At least two qualified seasons are required. Only qualified seasons contribute to qualified games.
Percentiles
Annual percentiles compare qualified referees in the same season. Multi-season percentiles compare 38 eligible referees. Blue indicates lower and red higher historical foul tendency; neither means better officiating.
Intervals
Saved 95% normal-approximation intervals describe uncertainty in estimated tendencies, not future single-game prediction ranges. Annual numeric intervals are not displayed.