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Blue Notes · Umpire Grade2026-04-25

MIN @ TB

Home plate: Brian Walsh

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

B+
Umpire Grade
93.4% accurate
0.3
Run Favor
runs, TB
5
ABS Overturns
of 6 reviewed

What this shows — how Brian Walsh called the 136 pitches that were taken (no swing), graded against the tracked rulebook strike zone. He got 127 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: Austin Martin — the ump called it a strike, the robot ruled strike (upheld — ump confirmed).1Challenge 2: Nick Fortes — the ump called it a ball, the robot ruled strike (OVERTURNED — ump overruled).2Challenge 3: Ryan Jeffers — the ump called it a ball, the robot ruled strike (OVERTURNED — ump overruled).3Challenge 4: Byron Buxton — the ump called it a strike, the robot ruled ball (OVERTURNED — ump overruled).4Challenge 5: Nick Fortes — the ump called it a ball, the robot ruled strike (OVERTURNED — ump overruled).5Challenge 6: Ryan Jeffers — the ump called it a ball, the robot ruled strike (OVERTURNED — ump overruled).6
strike called ballball called strikeABS overturnedABS upheld

The calls that moved the game

  1. 1-0.28▲7 · 1-2 ball called strike· challenged ✓
    Byron Buxton vs Kevin Kelly
  2. 2+0.28▼8 · 1-2 strike called ball· challenged ✓
    Jonathan Aranda vs Garrett Acton
  3. 3-0.20▼8 · 2-1 ball called strike
    Jonny DeLuca vs Garrett Acton

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

  1. 1Austin Martin — ump said strike, robot ruled strike: upheld.
  2. 2Nick Fortes — ump said ball, robot ruled strike: overturned.
  3. 3Ryan Jeffers — ump said ball, robot ruled strike: overturned.
  4. 4Byron Buxton — ump said strike, robot ruled ball: overturned.
  5. 5Nick Fortes — ump said ball, robot ruled strike: overturned.
  6. 6Ryan Jeffers — ump said ball, robot ruled strike: 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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