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Blue Notes · Umpire Grade2026-09-16

MIA @ AZ

Home plate: Chris Segal

“The Automated Ball-Strike System put in some overtime here.”

C
Umpire Grade
89.2% accurate
0.2
Run Favor
runs, MIA
5
ABS Overturns
of 7 reviewed

What this shows — how Chris Segal called the 157 pitches that were taken (no swing), graded against the tracked rulebook strike zone. He got 140 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: Esteury Ruiz — the ump called it a strike, the robot ruled ball (OVERTURNED — ump overruled).1Challenge 2: Tim Tawa — the ump called it a strike, the robot ruled ball (OVERTURNED — ump overruled).2Challenge 3: Joe Mack — the ump called it a ball, the robot ruled strike (OVERTURNED — ump overruled).3Challenge 4: Joe Mack — the ump called it a ball, the robot ruled ball (upheld — ump confirmed).4Challenge 5: Gabriel Moreno — the ump called it a strike, the robot ruled ball (OVERTURNED — ump overruled).5Challenge 6: Gabriel Moreno — the ump called it a strike, the robot ruled ball (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+0.23▼7 · 0-2 strike called ball· challenged
    Lars Nootbaar vs Jack Ralston
  2. 2+0.20▼2 · 2-1 strike called ball· challenged ✓
    Lars Nootbaar vs Ryan Gusto
  3. 3-0.20▼7 · 2-1 ball called strike· challenged ✓
    Gabriel Moreno vs Jack Ralston

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 · 5 overturned (ump overruled) · 2 upheld (ump confirmed). This is the ABS system’s own measurement — Hawk-Eye optical ball-tracking, not our model.

  1. 1Esteury Ruiz — ump said strike, robot ruled ball: overturned.
  2. 2Tim Tawa — ump said strike, robot ruled ball: overturned.
  3. 3Joe Mack — ump said ball, robot ruled strike: overturned.
  4. 4Joe Mack — ump said ball, robot ruled ball: upheld.
  5. 5Gabriel Moreno — ump said strike, robot ruled ball: overturned.
  6. 6Gabriel Moreno — ump said strike, robot ruled ball: 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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