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Blue Notes · Umpire Grade2026-09-15

SEA @ LAA

Home plate: Brian Walsh

“The plate grew a few inches after the first pitch.”

B
Umpire Grade
92.9% accurate
0.6
Run Favor
runs, LAA
4
ABS Overturns
of 7 reviewed

What this shows — how Brian Walsh called the 113 pitches that were taken (no swing), graded against the tracked rulebook strike zone. He got 105 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: Tyler Heineman — the ump called it a ball, the robot ruled strike (OVERTURNED — ump overruled).1Challenge 2: Zach Neto — the ump called it a strike, the robot ruled ball (OVERTURNED — ump overruled).2Challenge 3: Lazaro Montes — the ump called it a strike, the robot ruled strike (upheld — ump confirmed).3Challenge 4: Randy Arozarena — the ump called it a strike, the robot ruled strike (upheld — ump confirmed).4Challenge 5: Mike Trout — the ump called it a strike, the robot ruled strike (upheld — ump confirmed).5Challenge 6: Josh Lowe — the ump called it a strike, the robot ruled ball (OVERTURNED — ump overruled).6Challenge 7: Tyler Heineman — the ump called it a ball, the robot ruled strike (OVERTURNED — ump overruled).7
strike called ballball called strikeABS overturnedABS upheld

The calls that moved the game

  1. 1-0.69▲7 · 3-2 ball called strike
    Michael Arroyo vs Tayler Saucedo
  2. 2-0.13▲8 · 1-1 ball called strike
    Randy Arozarena vs José Fermin
  3. 3-0.13▼5 · 1-0 ball called strike
    Mike Trout vs Logan Gilbert

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 · 4 overturned (ump overruled) · 3 upheld (ump confirmed). This is the ABS system’s own measurement — Hawk-Eye optical ball-tracking, not our model.

  1. 1Tyler Heineman — ump said ball, robot ruled strike: overturned.
  2. 2Zach Neto — ump said strike, robot ruled ball: overturned.
  3. 3Lazaro Montes — ump said strike, robot ruled strike: upheld.
  4. 4Randy Arozarena — ump said strike, robot ruled strike: upheld.
  5. 5Mike Trout — ump said strike, robot ruled strike: upheld.
  6. 6Josh Lowe — ump said strike, robot ruled ball: overturned.
  7. 7Tyler Heineman — ump said ball, robot ruled strike: overturned.

Our tracked-rulebook zone matched the ABS ruling on 4 of 7 — a zone-definition gap (ABS grades a standardized, height-based zone), not our error.

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