01 · The ledger
The refs decide
games. We grade
the refs.
Tonight’s officiating crew, read before tip-off. NBA and NHL from December, MLB and NFL to follow. Career tendency data, the sample size next to every number, and no narratives. Just the whistle.
02 · Tonight’s card
Tonight’s card
| Role | Official | Call rate vs average |
|---|---|---|
| CREW CHIEF (SAMPLE) | Sample Crew Chief An=47 | +18% fouls vs avg ↑ |
| REFEREE (SAMPLE) | Sample Referee Bn=52 | +6% fouls vs avg ↑ |
| UMPIRE (SAMPLE) | Sample Umpire Cn=61 | −4% fouls vs avg ↓ |
- 1.31×
- CLUTCH WHISTLE n=47
- +3.2
- PACE DELTA n=47
- +2.1
- HOME EDGE (PTS) n=47
- 47
- GAME SAMPLE n=47
03 · The model read
The model read
BEST BET
Over 228.5 · EV +4.2%
Crew pace and whistle rate both clear of the line.
Confidence 71%
VALUE PLAY
Tatum over 29.5 pts · EV +2.1%
Foul trouble on the other side keeps him on the floor.
Confidence 58%
STAY AWAY
Celtics -4.5 · EV −1.8%
Home whistle edge already priced in. No margin.
Confidence 64%
METHOD · Hierarchical per-official model, 47-game minimum sample, backtest window 2021-22 to 2025-26 against closing lines. Live reads stay off until the backtest is published. Full methodology
04 · Also on the slate
Also on the slate
Two referees pulling in opposite directions. The busy one wins the first period; the third period goes quiet.
05 · The beat
Leagues we cover
Three officials, about 40 fouls a night, and a crew list posted around 9 a.m. ET on game day. That is enough time to read the crew before tip-off.
Two referees, two linesmen. Each minor penalty is about two minutes of power play at roughly 20% conversion, so a tight crew moves goals, shots and save props.
The home-plate umpire's zone is the purest official-impact story in sport. We will read it before first pitch, not grade it after the final out.
Seven-person crews, published a few days before kickoff. Crew effects on final scores are weak; the story is how games flow and which props it touches.