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Blue Notes · Umpire Grade2026-06-02

PIT @ HOU

Home plate: Louie Krupa

“You could set a watch by that zone.”

A
Umpire Grade
95.6% accurate
0.1
Run Favor
runs, HOU
2
ABS Overturns
of 6 reviewed

What this shows — how Louie Krupa called the 183 pitches that were taken (no swing), graded against the tracked rulebook strike zone. He got 175 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: Spencer Horwitz — the ump called it a strike, the robot ruled strike (upheld — ump confirmed).1Challenge 2: Jake Meyers — the ump called it a strike, the robot ruled strike (upheld — ump confirmed).2Challenge 3: Bryan Reynolds — the ump called it a strike, the robot ruled ball (OVERTURNED — ump overruled).3Challenge 4: Bryan Abreu — the ump called it a ball, the robot ruled ball (upheld — ump confirmed).4Challenge 5: Bryan Reynolds — the ump called it a strike, the robot ruled ball (OVERTURNED — ump overruled).5Challenge 6: Jake Mangum — the ump called it a strike, the robot ruled strike (upheld — ump confirmed).6
strike called ballball called strikeABS overturnedABS upheld

The calls that moved the game

  1. 1-0.28▲2 · 1-2 ball called strike
    Oneil Cruz vs Mike Burrows
  2. 2+0.19▲8 · 2-0 strike called ball
    Spencer Horwitz vs Bryan Abreu
  3. 3-0.13▲5 · 1-1 ball called strike
    Brandon Lowe vs Mike Burrows

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

  1. 1Spencer Horwitz — ump said strike, robot ruled strike: upheld.
  2. 2Jake Meyers — ump said strike, robot ruled strike: upheld.
  3. 3Bryan Reynolds — ump said strike, robot ruled ball: overturned.
  4. 4Bryan Abreu — ump said ball, robot ruled ball: upheld.
  5. 5Bryan Reynolds — ump said strike, robot ruled ball: overturned.
  6. 6Jake Mangum — ump said strike, robot ruled strike: upheld.

Our tracked-rulebook zone matched the ABS ruling on 4 of 6 — a zone-definition gap (ABS grades a standardized, height-based zone), not our error.

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