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Blue Notes · Umpire Grade2026-04-27

BOS @ TOR

Home plate: Marvin Hudson

“Corner-to-corner and then some.”

D
Umpire Grade
88.0% accurate
0.4
Run Favor
runs, BOS
4
ABS Overturns
of 6 reviewed

What this shows — how Marvin Hudson called the 150 pitches that were taken (no swing), graded against the tracked rulebook strike zone. He got 132 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: Myles Straw — 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 strike (OVERTURNED — ump overruled).2Challenge 3: Vladimir Guerrero Jr. — the ump called it a strike, the robot ruled strike (upheld — ump confirmed).3Challenge 4: Trevor Story — the ump called it a strike, the robot ruled ball (OVERTURNED — ump overruled).4Challenge 5: Caleb Durbin — the ump called it a strike, the robot ruled strike (upheld — ump confirmed).5Challenge 6: Davis Schneider — the ump called it a strike, the robot ruled ball (OVERTURNED — ump overruled).6
strike called ballball called strikeABS overturnedABS upheld

The calls that moved the game

  1. 1-0.28▼2 · 1-2 ball called strike
    Eloy Jiménez vs Ranger Suarez
  2. 2-0.23▲5 · 0-2 ball called strike· challenged ✓
    Trevor Story vs Dylan Cease
  3. 3-0.21▼5 · 3-0 ball called strike
    Eloy Jiménez vs Ranger Suarez

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

6 pitches went to the robots · 4 overturned (ump overruled) · 2 upheld (ump confirmed). This is the ABS system’s own measurement — Hawk-Eye optical ball-tracking, not our model.

  1. 1Myles Straw — ump said strike, robot ruled ball: overturned.
  2. 2Tyler Heineman — ump said ball, robot ruled strike: overturned.
  3. 3Vladimir Guerrero Jr. — ump said strike, robot ruled strike: upheld.
  4. 4Trevor Story — ump said strike, robot ruled ball: overturned.
  5. 5Caleb Durbin — ump said strike, robot ruled strike: upheld.
  6. 6Davis Schneider — ump said strike, robot ruled ball: overturned.

Our tracked-rulebook zone matched the ABS ruling on 5 of 6 — a zone-definition gap (ABS grades a standardized, height-based zone), not our error.

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