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RECORD: 4 HIT · 4 MISS · 9 OPEN
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Blue Notes · Umpire Grade2026-05-23

PIT @ TOR

Home plate: Alan Porter

“The zone kept its promises.”

B+
Umpire Grade
93.1% accurate
0.2
Run Favor
runs, PIT
2
ABS Overturns
of 3 reviewed

What this shows — how Alan Porter called the 130 pitches that were taken (no swing), graded against the tracked rulebook strike zone. He got 121 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: Henry Davis — the ump called it a ball, the robot ruled strike (OVERTURNED — ump overruled).1Challenge 2: Tyler Heineman — the ump called it a ball, the robot ruled strike (OVERTURNED — ump overruled).2Challenge 3: Tyler Heineman — the ump called it a ball, the robot ruled ball (upheld — ump confirmed).3
strike called ballball called strikeABS overturnedABS upheld

The calls that moved the game

  1. 1+0.69▲8 · 3-2 strike called ball· challenged
    Bryan Reynolds vs Yariel Rodríguez
  2. 2-0.23▲7 · 0-2 ball called strike
    Oneil Cruz vs Braydon Fisher
  3. 3+0.13▼1 · 1-1 strike called ball
    Vladimir Guerrero Jr. vs Paul Skenes

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

3 pitches went to the robots · 2 overturned (ump overruled) · 1 upheld (ump confirmed). This is the ABS system’s own measurement — Hawk-Eye optical ball-tracking, not our model.

  1. 1Henry Davis — ump said ball, robot ruled strike: overturned.
  2. 2Tyler Heineman — ump said ball, robot ruled strike: overturned.
  3. 3Tyler Heineman — ump said ball, robot ruled ball: upheld.

Our tracked-rulebook zone matched the ABS ruling on 1 of 3 — a zone-definition gap (ABS grades a standardized, height-based zone), not our error.

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