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Blue Notes · Umpire Grade2026-05-30

TOR @ BAL

Home plate: Adam Hamari

“The zone kept its promises.”

B+
Umpire Grade
93.5% accurate
0.4
Run Favor
runs, TOR
2
ABS Overturns
of 4 reviewed

What this shows — how Adam Hamari called the 170 pitches that were taken (no swing), graded against the tracked rulebook strike zone. He got 159 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: Coby Mayo — the ump called it a strike, the robot ruled ball (OVERTURNED — ump overruled).1Challenge 2: Tyler Heineman — the ump called it a ball, the robot ruled ball (upheld — ump confirmed).2Challenge 3: Tyler Heineman — the ump called it a ball, the robot ruled strike (OVERTURNED — ump overruled).3Challenge 4: Tyler Heineman — the ump called it a ball, the robot ruled ball (upheld — ump confirmed).4
strike called ballball called strikeABS overturnedABS upheld

The calls that moved the game

  1. 1-0.28▼4 · 1-2 ball called strike· challenged ✓
    Coby Mayo vs Trey Yesavage
  2. 2-0.28▼5 · 1-2 ball called strike
    Taylor Ward vs Trey Yesavage
  3. 3-0.23▲4 · 0-2 ball called strike
    Kazuma Okamoto vs Brandon Young

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

  1. 1Coby Mayo — ump said strike, robot ruled ball: overturned.
  2. 2Tyler Heineman — ump said ball, robot ruled ball: upheld.
  3. 3Tyler Heineman — ump said ball, robot ruled strike: overturned.
  4. 4Tyler Heineman — ump said ball, robot ruled ball: upheld.

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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