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Blue Notes · Umpire Grade2026-08-29

PIT @ STL

Home plate: Marvin Hudson

“The Automated Ball-Strike System put in some overtime here.”

A-
Umpire Grade
94.4% accurate
1.3
Run Favor
runs, STL
6
ABS Overturns
of 7 reviewed

What this shows — how Marvin Hudson called the 161 pitches that were taken (no swing), graded against the tracked rulebook strike zone. He got 152 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: Jake Mangum — the ump called it a ball, the robot ruled strike (OVERTURNED — ump overruled).1Challenge 2: Jordan Walker — the ump called it a ball, the robot ruled strike (OVERTURNED — ump overruled).2Challenge 3: Rafael Flores Jr. — the ump called it a strike, the robot ruled ball (OVERTURNED — ump overruled).3Challenge 4: Carmen Mlodzinski — the ump called it a strike, the robot ruled ball (OVERTURNED — ump overruled).4Challenge 5: Nick Gonzales — the ump called it a ball, the robot ruled strike (OVERTURNED — ump overruled).5Challenge 6: Jimmy Crooks — the ump called it a ball, the robot ruled ball (upheld — ump confirmed).6Challenge 7: Gregory Soto — 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. 1-0.30▲3 · 3-1 ball called strike
    Brandon Lowe vs Kyle Leahy
  2. 2+0.28▼7 · 1-2 strike called ball
    JJ Wetherholt vs Gregory Soto
  3. 3+0.21▼3 · 3-0 strike called ball
    Iván Herrera vs Evan Sisk

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

  1. 1Jake Mangum — ump said ball, robot ruled strike: overturned.
  2. 2Jordan Walker — ump said ball, robot ruled strike: overturned.
  3. 3Rafael Flores Jr. — ump said strike, robot ruled ball: overturned.
  4. 4Carmen Mlodzinski — ump said strike, robot ruled ball: overturned.
  5. 5Nick Gonzales — ump said ball, robot ruled strike: overturned.
  6. 6Jimmy Crooks — ump said ball, robot ruled ball: upheld.
  7. 7Gregory Soto — ump said strike, robot ruled ball: overturned.

Our tracked-rulebook zone matched the ABS ruling on 1 of 7 — a zone-definition gap (ABS grades a standardized, height-based zone), not our error.

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