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Blue Notes · Umpire Grade2026-04-26

PHI @ ATL

Home plate: Mike Muchlinski

“The robots earned their keep tonight.”

B
Umpire Grade
92.5% accurate
0.4
Run Favor
runs, PHI
7
ABS Overturns
of 9 reviewed

What this shows — how Mike Muchlinski called the 160 pitches that were taken (no swing), graded against the tracked rulebook strike zone. He got 148 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: Drake Baldwin — the ump called it a ball, the robot ruled strike (OVERTURNED — ump overruled).1Challenge 2: Alec Bohm — the ump called it a strike, the robot ruled ball (OVERTURNED — ump overruled).2Challenge 3: Ronald Acuña Jr. — the ump called it a strike, the robot ruled ball (OVERTURNED — ump overruled).3Challenge 4: Kyle Schwarber — the ump called it a strike, the robot ruled ball (OVERTURNED — ump overruled).4Challenge 5: Michael Harris II — the ump called it a strike, the robot ruled ball (OVERTURNED — ump overruled).5Challenge 6: Mauricio Dubón — the ump called it a strike, the robot ruled strike (upheld — ump confirmed).6Challenge 7: Rafael Marchán — the ump called it a ball, the robot ruled ball (upheld — ump confirmed).7Challenge 8: Dylan Moore — the ump called it a strike, the robot ruled ball (OVERTURNED — ump overruled).8Challenge 9: Drake Baldwin — the ump called it a ball, the robot ruled strike (OVERTURNED — ump overruled).9
strike called ballball called strikeABS overturnedABS upheld

The calls that moved the game

  1. 1+0.39▲1 · 2-2 strike called ball
    Kyle Schwarber vs Chris Sale
  2. 2-0.30▲3 · 3-1 ball called strike
    Dylan Moore vs Chris Sale
  3. 3+0.28▼6 · 1-2 strike called ball
    Drake Baldwin vs Tim Mayza

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

9 pitches went to the robots · 7 overturned (ump overruled) · 2 upheld (ump confirmed). This is the ABS system’s own measurement — Hawk-Eye optical ball-tracking, not our model.

  1. 1Drake Baldwin — ump said ball, robot ruled strike: overturned.
  2. 2Alec Bohm — ump said strike, robot ruled ball: overturned.
  3. 3Ronald Acuña Jr. — ump said strike, robot ruled ball: overturned.
  4. 4Kyle Schwarber — ump said strike, robot ruled ball: overturned.
  5. 5Michael Harris II — ump said strike, robot ruled ball: overturned.
  6. 6Mauricio Dubón — ump said strike, robot ruled strike: upheld.
  7. 7Rafael Marchán — ump said ball, robot ruled ball: upheld.
  8. 8Dylan Moore — ump said strike, robot ruled ball: overturned.
  9. 9Drake Baldwin — ump said ball, robot ruled strike: overturned.

Our tracked-rulebook zone matched the ABS ruling on 7 of 9 — a zone-definition gap (ABS grades a standardized, height-based zone), not our error.

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