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Blue Notes · Umpire Grade2026-07-03

MIL @ AZ

Home plate: David Rackley

“A steady night's work behind the plate.”

B
Umpire Grade
92.9% accurate
0.4
Run Favor
runs, AZ
4
ABS Overturns
of 7 reviewed

What this shows — how David Rackley called the 198 pitches that were taken (no swing), graded against the tracked rulebook strike zone. He got 184 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

Challenge 1: David Hamilton — the ump called it a strike, the robot ruled ball (OVERTURNED — ump overruled).1Challenge 2: Gabriel Moreno — the ump called it a strike, the robot ruled ball (OVERTURNED — ump overruled).2Challenge 3: William Contreras — the ump called it a ball, the robot ruled ball (upheld — ump confirmed).3Challenge 4: Ildemaro Vargas — the ump called it a strike, the robot ruled strike (upheld — ump confirmed).4Challenge 5: Gabriel Moreno — the ump called it a ball, the robot ruled strike (OVERTURNED — ump overruled).5Challenge 6: William Contreras — the ump called it a ball, the robot ruled strike (OVERTURNED — ump overruled).6Challenge 7: Geraldo Perdomo — the ump called it a strike, the robot ruled strike (upheld — ump confirmed).7
strike called ballball called strikeABS overturnedABS upheld

The calls that moved the game

  1. 1-0.30▼8 · 3-1 ball called strike
    Gabriel Moreno vs Abner Uribe
  2. 2+0.28▼4 · 1-2 strike called ball
    Tommy Troy vs Chad Patrick
  3. 3-0.13▲6 · 1-1 ball called strike
    Sal Frelick vs Kevin Ginkel

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

7 pitches went to the robots · 4 overturned (ump overruled) · 3 upheld (ump confirmed). This is the ABS system’s own measurement — Hawk-Eye optical ball-tracking, not our model.

  1. 1David Hamilton — ump said strike, robot ruled ball: overturned.
  2. 2Gabriel Moreno — ump said strike, robot ruled ball: overturned.
  3. 3William Contreras — ump said ball, robot ruled ball: upheld.
  4. 4Ildemaro Vargas — ump said strike, robot ruled strike: upheld.
  5. 5Gabriel Moreno — ump said ball, robot ruled strike: overturned.
  6. 6William Contreras — ump said ball, robot ruled strike: overturned.
  7. 7Geraldo Perdomo — ump said strike, robot ruled strike: upheld.

Our tracked-rulebook zone matched the ABS ruling on 6 of 7 — a zone-definition gap (ABS grades a standardized, height-based zone), not our error.

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