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Blue Notes · Umpire Grade2026-04-23

CWS @ AZ

Home plate: Cory Blaser

“Nothing that'll trend, and on this beat that's a compliment.”

B
Umpire Grade
92.6% accurate
0.8
Run Favor
runs, AZ
3
ABS Overturns
of 7 reviewed

What this shows — how Cory Blaser called the 149 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: Alek Thomas — the ump called it a strike, the robot ruled ball (OVERTURNED — ump overruled).1Challenge 2: Reese McGuire — the ump called it a ball, the robot ruled ball (upheld — ump confirmed).2Challenge 3: Ildemaro Vargas — the ump called it a strike, the robot ruled ball (OVERTURNED — ump overruled).3Challenge 4: Alek Thomas — the ump called it a strike, the robot ruled strike (upheld — ump confirmed).4Challenge 5: Chase Meidroth — the ump called it a strike, the robot ruled ball (OVERTURNED — ump overruled).5Challenge 6: Jorge Barrosa — the ump called it a strike, the robot ruled strike (upheld — ump confirmed).6Challenge 7: Edgar Quero — the ump called it a ball, the robot ruled ball (upheld — ump confirmed).7
strike called ballball called strikeABS overturnedABS upheld

The calls that moved the game

  1. 1-0.21▲2 · 3-0 ball called strike
    Sam Antonacci vs Michael Soroka
  2. 2-0.21▲9 · 3-0 ball called strike· challenged ✓
    Chase Meidroth vs Paul Sewald
  3. 3-0.20▲7 · 2-1 ball called strike
    Andrew Benintendi vs Kevin Ginkel

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

  1. 1Alek Thomas — ump said strike, robot ruled ball: overturned.
  2. 2Reese McGuire — ump said ball, robot ruled ball: upheld.
  3. 3Ildemaro Vargas — ump said strike, robot ruled ball: overturned.
  4. 4Alek Thomas — ump said strike, robot ruled strike: upheld.
  5. 5Chase Meidroth — ump said strike, robot ruled ball: overturned.
  6. 6Jorge Barrosa — ump said strike, robot ruled strike: upheld.
  7. 7Edgar Quero — ump said ball, robot ruled ball: upheld.

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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