Blue Notes · Umpire Grade2026-04-26
DET @ CIN
Home plate: Brian O'Nora
“Down the middle. Both dugouts had the same zone.”
Umpire Grade
91.8% accurate
Run Favor
runs, DET
ABS Overturns
of 4 reviewed
What this shows — how Brian O'Nora called the 182 pitches that were taken (no swing), graded against the tracked rulebook strike zone. He got 167 right. Below, only his misses are plotted, alongside every pitch the ABS (Automated Ball-Strike System) reviewed on a challenge.
The zone, as he called it
strike called ballball called strikeABS overturnedABS upheld
The calls that moved the game
- 1-0.39▼5 · 2-2 ball called strike
Elly De La Cruz vs Keider Montero - 2+0.28▼4 · 1-2 strike called ball
JJ Bleday vs Keider Montero - 3+0.28▲7 · 1-2 strike called ball
Jahmai Jones vs Pierce Johnson
Run impact from the count run-value table: a missed strike three is worth far more than one on 3-0.
ABS — the Automated Ball-Strike System
4 pitches went to the robots · 3 overturned (ump overruled) · 1 upheld (ump confirmed). This is Hawkeye ground truth, no model involved.
- 1Jake Rogers — ump said strike, robot ruled ball: overturned.
- 2Jake Rogers — ump said strike, robot ruled strike: upheld.
- 3Kerry Carpenter — ump said ball, robot ruled strike: overturned.
- 4Jake Rogers — ump said strike, robot ruled ball: overturned.
Our tracked-rulebook zone matched the ABS ruling on 2 of 4 — a zone-definition gap (ABS grades a standardized, height-based zone), not our error.