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Blue Notes · Umpire Grade2026-09-26

STL @ MIL

Home plate: Jordan Baker

“The kind of night where the umpire is the least of the story.”

A-
Umpire Grade
94.8% accurate
0.1
Run Favor
runs, STL
4
ABS Overturns
of 6 reviewed

What this shows — how Jordan Baker called the 155 pitches that were taken (no swing), graded against the tracked rulebook strike zone. He got 147 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: William Contreras — the ump called it a ball, the robot ruled strike (OVERTURNED — ump overruled).1Challenge 2: William Contreras — the ump called it a ball, the robot ruled strike (OVERTURNED — ump overruled).2Challenge 3: Leo Bernal — the ump called it a strike, the robot ruled ball (OVERTURNED — ump overruled).3Challenge 4: Leo Bernal — the ump called it a ball, the robot ruled strike (OVERTURNED — ump overruled).4Challenge 5: Nolan Gorman — the ump called it a strike, the robot ruled strike (upheld — ump confirmed).5Challenge 6: Leo Bernal — the ump called it a ball, the robot ruled ball (upheld — ump confirmed).6
strike called ballball called strikeABS overturnedABS upheld

The calls that moved the game

  1. 1+0.69▼3 · 3-2 strike called ball· challenged ✓
    William Contreras vs Quinn Mathews
  2. 2+0.39▲8 · 2-2 strike called ball
    JJ Wetherholt vs Aaron Ashby
  3. 3-0.28▲2 · 1-2 ball called strike· challenged ✓
    Leo Bernal vs Dustin May

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

6 pitches went to the robots · 4 overturned (ump overruled) · 2 upheld (ump confirmed). This is the ABS system’s own measurement — Hawk-Eye optical ball-tracking, not our model.

  1. 1William Contreras — ump said ball, robot ruled strike: overturned.
  2. 2William Contreras — ump said ball, robot ruled strike: overturned.
  3. 3Leo Bernal — ump said strike, robot ruled ball: overturned.
  4. 4Leo Bernal — ump said ball, robot ruled strike: overturned.
  5. 5Nolan Gorman — ump said strike, robot ruled strike: upheld.
  6. 6Leo Bernal — ump said ball, robot ruled ball: upheld.

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

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