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RECORD: 8 HIT · 12 MISS · 1 OPEN
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Blue Notes · Umpire Grade2026-09-20

KC @ PIT

Home plate: Brian Walsh

“Solid and unspectacular — exactly what the job asks.”

A
Umpire Grade
95.2% accurate
0.5
Run Favor
runs, PIT
3
ABS Overturns
of 6 reviewed

What this shows — how Brian Walsh called the 145 pitches that were taken (no swing), graded against the tracked rulebook strike zone. He got 138 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: John Rave — the ump called it a strike, the robot ruled strike (upheld — ump confirmed).1Challenge 2: Jake Mangum — the ump called it a strike, the robot ruled strike (upheld — ump confirmed).2Challenge 3: Rafael Flores Jr. — the ump called it a ball, the robot ruled ball (upheld — ump confirmed).3Challenge 4: Luke Maile — the ump called it a ball, the robot ruled strike (OVERTURNED — ump overruled).4Challenge 5: Luke Maile — the ump called it a ball, the robot ruled strike (OVERTURNED — ump overruled).5Challenge 6: John Rave — 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+0.28▼1 · 1-2 strike called ball
    Brandon Lowe vs Michael Wacha
  2. 2+0.13▼8 · 1-0 strike called ball· challenged ✓
    Spencer Horwitz vs Nate Pearson
  3. 3+0.10▼4 · 0-1 strike called ball
    Rafael Flores Jr. vs Michael Wacha

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. 1John Rave — ump said strike, robot ruled strike: upheld.
  2. 2Jake Mangum — ump said strike, robot ruled strike: upheld.
  3. 3Rafael Flores Jr. — ump said ball, robot ruled ball: upheld.
  4. 4Luke Maile — ump said ball, robot ruled strike: overturned.
  5. 5Luke Maile — ump said ball, robot ruled strike: overturned.
  6. 6John Rave — 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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