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Blue Notes · Umpire Grade2026-09-16

KC @ HOU

Home plate: Stu Scheurwater

“Reliable as a Tuesday: no complaints, no headlines.”

B
Umpire Grade
93.0% accurate
0.3
Run Favor
runs, KC
4
ABS Overturns
of 5 reviewed

What this shows — how Stu Scheurwater called the 142 pitches that were taken (no swing), graded against the tracked rulebook strike zone. He got 132 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: Jeremy Peña — the ump called it a strike, the robot ruled ball (OVERTURNED — ump overruled).1Challenge 2: Yainer Diaz — the ump called it a ball, the robot ruled strike (OVERTURNED — ump overruled).2Challenge 3: Josh Rojas — the ump called it a strike, the robot ruled ball (OVERTURNED — ump overruled).3Challenge 4: Carter Jensen — the ump called it a ball, the robot ruled strike (OVERTURNED — ump overruled).4Challenge 5: Steven Cruz — the ump called it a ball, the robot ruled ball (upheld — ump confirmed).5
strike called ballball called strikeABS overturnedABS upheld

The calls that moved the game

  1. 1-0.23▲8 · 0-2 ball called strike
    Bobby Witt Jr. vs Enyel De Los Santos
  2. 2-0.23▼9 · 0-2 ball called strike
    Joey Loperfido vs Steven Cruz
  3. 3-0.21▼4 · 3-0 ball called strike
    Isaac Paredes vs Daniel Lynch IV

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

5 pitches went to the robots · 4 overturned (ump overruled) · 1 upheld (ump confirmed). This is the ABS system’s own measurement — Hawk-Eye optical ball-tracking, not our model.

  1. 1Jeremy Peña — ump said strike, robot ruled ball: overturned.
  2. 2Yainer Diaz — ump said ball, robot ruled strike: overturned.
  3. 3Josh Rojas — ump said strike, robot ruled ball: overturned.
  4. 4Carter Jensen — ump said ball, robot ruled strike: overturned.
  5. 5Steven Cruz — ump said ball, robot ruled ball: upheld.

Our tracked-rulebook zone matched the ABS ruling on 4 of 5 — a zone-definition gap (ABS grades a standardized, height-based zone), not our error.

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