Blue Notes · Umpire Grade2026-05-21
ATH @ LAA
Home plate: David Rackley
“Down the middle. Both dugouts had the same zone.”
Umpire Grade
95.2% accurate
Run Favor
runs, ATH
ABS Overturns
of 4 reviewed
What this shows — how David Rackley called the 145 pitches that were taken (no swing), graded against the tracked rulebook strike zone. He got 138 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+0.69▲10 · 3-2 strike called ball· challenged
Henry Bolte vs Ryan Zeferjahn - 2-0.13▲1 · 1-0 ball called strike
Carlos Cortes vs José Soriano - 3+0.10▲3 · 0-1 strike called ball
Lawrence Butler vs José Soriano
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 · 1 overturned (ump overruled) · 3 upheld (ump confirmed). This is Hawkeye ground truth, no model involved.
- 1Sebastián Rivero — ump said ball, robot ruled ball: upheld.
- 2Logan O'Hoppe — ump said strike, robot ruled ball: overturned.
- 3Vaughn Grissom — ump said strike, robot ruled strike: upheld.
- 4Logan O'Hoppe — ump said ball, robot ruled ball: upheld.
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.