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Blue Notes · Umpire Grade2026-05-12

DET @ NYM

Home plate: Stu Scheurwater

“Off the corner was close enough tonight.”

D
Umpire Grade
88.0% accurate
0.2
Run Favor
runs, NYM
3
ABS Overturns
of 6 reviewed

What this shows — how Stu Scheurwater called the 200 pitches that were taken (no swing), graded against the tracked rulebook strike zone. He got 176 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: Francisco Alvarez — the ump called it a ball, the robot ruled strike (OVERTURNED — ump overruled).1Challenge 2: Dillon Dingler — the ump called it a ball, the robot ruled ball (upheld — ump confirmed).2Challenge 3: MJ Melendez — the ump called it a strike, the robot ruled strike (upheld — ump confirmed).3Challenge 4: Freddy Peralta — the ump called it a ball, the robot ruled strike (OVERTURNED — ump overruled).4Challenge 5: Francisco Alvarez — the ump called it a strike, the robot ruled strike (upheld — ump confirmed).5Challenge 6: Dillon Dingler — the ump called it a strike, the robot ruled ball (OVERTURNED — ump overruled).6
strike called ballball called strikeABS overturnedABS upheld

The calls that moved the game

  1. 1+0.69▲1 · 3-2 strike called ball· challenged ✓
    Colt Keith vs Freddy Peralta
  2. 2+0.69▼2 · 3-2 strike called ball
    MJ Melendez vs Jack Flaherty
  3. 3+0.39▼2 · 2-2 strike called ball
    MJ Melendez vs Jack Flaherty

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

  1. 1Francisco Alvarez — ump said ball, robot ruled strike: overturned.
  2. 2Dillon Dingler — ump said ball, robot ruled ball: upheld.
  3. 3MJ Melendez — ump said strike, robot ruled strike: upheld.
  4. 4Freddy Peralta — ump said ball, robot ruled strike: overturned.
  5. 5Francisco Alvarez — ump said strike, robot ruled strike: upheld.
  6. 6Dillon Dingler — ump said strike, robot ruled ball: overturned.

Our tracked-rulebook zone matched the ABS ruling on 5 of 6 — a zone-definition gap (ABS grades a standardized, height-based zone), not our error.

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