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Blue Notes · Umpire Grade2026-06-06

MIL @ COL

Home plate: Stu Scheurwater

“A workmanlike night — nothing to frame, nothing to fix.”

B-
Umpire Grade
91.8% accurate
0.9
Run Favor
runs, MIL
4
ABS Overturns
of 7 reviewed

What this shows — how Stu Scheurwater called the 171 pitches that were taken (no swing), graded against the tracked rulebook strike zone. He got 157 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: Brett Sullivan — the ump called it a ball, the robot ruled ball (upheld — ump confirmed).1Challenge 2: Blas Castaño — the ump called it a ball, the robot ruled strike (OVERTURNED — ump overruled).2Challenge 3: William Contreras — the ump called it a ball, the robot ruled strike (OVERTURNED — ump overruled).3Challenge 4: Brett Sullivan — the ump called it a strike, the robot ruled strike (upheld — ump confirmed).4Challenge 5: William Contreras — the ump called it a ball, the robot ruled strike (OVERTURNED — ump overruled).5Challenge 6: Christian Yelich — the ump called it a strike, the robot ruled strike (upheld — ump confirmed).6Challenge 7: Brice Turang — the ump called it a strike, the robot ruled ball (OVERTURNED — ump overruled).7
strike called ballball called strikeABS overturnedABS upheld

The calls that moved the game

  1. 1+0.69▲4 · 3-2 strike called ball· challenged ✓
    Jackson Chourio vs Blas Castaño
  2. 2+0.23▲4 · 0-2 strike called ball· challenged
    Jackson Chourio vs Blas Castaño
  3. 3+0.13▼3 · 1-1 strike called ball
    Kyle Karros vs Jacob Misiorowski

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. 1Brett Sullivan — ump said ball, robot ruled ball: upheld.
  2. 2Blas Castaño — ump said ball, robot ruled strike: overturned.
  3. 3William Contreras — ump said ball, robot ruled strike: overturned.
  4. 4Brett Sullivan — ump said strike, robot ruled strike: upheld.
  5. 5William Contreras — ump said ball, robot ruled strike: overturned.
  6. 6Christian Yelich — ump said strike, robot ruled strike: upheld.
  7. 7Brice Turang — ump said strike, robot ruled ball: overturned.

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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