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Blue Notes · Umpire Grade2026-04-02

MIN @ KC

Home plate: Cory Blaser

“The kind of night where the umpire is the least of the story.”

B+
Umpire Grade
93.1% accurate
0.6
Run Favor
runs, KC
3
ABS Overturns
of 4 reviewed

What this shows — how Cory Blaser called the 160 pitches that were taken (no swing), graded against the tracked rulebook strike zone. He got 149 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: Victor Caratini — the ump called it a ball, the robot ruled strike (OVERTURNED — ump overruled).1Challenge 2: Victor Caratini — the ump called it a ball, the robot ruled strike (OVERTURNED — ump overruled).2Challenge 3: Victor Caratini — the ump called it a ball, the robot ruled ball (upheld — ump confirmed).3Challenge 4: Royce Lewis — the ump called it a strike, the robot ruled ball (OVERTURNED — ump overruled).4
strike called ballball called strikeABS overturnedABS upheld

The calls that moved the game

  1. 1-0.30▲3 · 3-1 ball called strike
    Austin Martin vs Cole Ragans
  2. 2+0.23▲5 · 0-2 strike called ball
    Royce Lewis vs Cole Ragans
  3. 3-0.21▼9 · 3-0 ball called strike
    Isaac Collins vs Justin Topa

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

4 pitches went to the robots · 3 overturned (ump overruled) · 1 upheld (ump confirmed). This is the ABS system’s own measurement — Hawk-Eye optical ball-tracking, not our model.

  1. 1Victor Caratini — ump said ball, robot ruled strike: overturned.
  2. 2Victor Caratini — ump said ball, robot ruled strike: overturned.
  3. 3Victor Caratini — ump said ball, robot ruled ball: upheld.
  4. 4Royce Lewis — ump said strike, robot ruled ball: overturned.

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

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