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Blue Notes · Umpire Grade2026-06-28

AZ @ TB

Home plate: Brian Walsh

“A busy night for the machines in the truck.”

B
Umpire Grade
92.7% accurate
0.3
Run Favor
runs, AZ
5
ABS Overturns
of 7 reviewed

What this shows — how Brian Walsh called the 124 pitches that were taken (no swing), graded against the tracked rulebook strike zone. He got 115 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: Nick Fortes — the ump called it a ball, the robot ruled strike (OVERTURNED — ump overruled).1Challenge 2: Nick Fortes — the ump called it a ball, the robot ruled strike (OVERTURNED — ump overruled).2Challenge 3: Tommy Troy — the ump called it a strike, the robot ruled ball (OVERTURNED — ump overruled).3Challenge 4: Adrian Del Castillo — the ump called it a ball, the robot ruled strike (OVERTURNED — ump overruled).4Challenge 5: Ketel Marte — the ump called it a strike, the robot ruled ball (OVERTURNED — ump overruled).5Challenge 6: Lourdes Gurriel Jr. — the ump called it a strike, the robot ruled strike (upheld — ump confirmed).6Challenge 7: Nolan Arenado — the ump called it a strike, the robot ruled strike (upheld — ump confirmed).7
strike called ballball called strikeABS overturnedABS upheld

The calls that moved the game

  1. 1+0.39▲3 · 2-2 strike called ball
    Geraldo Perdomo vs Drew Rasmussen
  2. 2-0.23▲3 · 0-2 ball called strike· challenged ✓
    Tommy Troy vs Drew Rasmussen
  3. 3+0.23▼4 · 0-2 strike called ball· challenged ✓
    Ben Williamson vs Merrill Kelly

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

  1. 1Nick Fortes — ump said ball, robot ruled strike: overturned.
  2. 2Nick Fortes — ump said ball, robot ruled strike: overturned.
  3. 3Tommy Troy — ump said strike, robot ruled ball: overturned.
  4. 4Adrian Del Castillo — ump said ball, robot ruled strike: overturned.
  5. 5Ketel Marte — ump said strike, robot ruled ball: overturned.
  6. 6Lourdes Gurriel Jr. — ump said strike, robot ruled strike: upheld.
  7. 7Nolan Arenado — ump said strike, robot ruled strike: upheld.

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

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