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Blue Notes · Umpire Grade2026-06-04

BAL @ BOS

Home plate: Marvin Hudson

“A few too many trips to the challenge cart.”

A
Umpire Grade
95.6% accurate
0.1
Run Favor
runs, BOS
5
ABS Overturns
of 7 reviewed

What this shows — how Marvin Hudson called the 135 pitches that were taken (no swing), graded against the tracked rulebook strike zone. He got 129 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: Carlos Narváez — the ump called it a ball, the robot ruled strike (OVERTURNED — ump overruled).1Challenge 2: Carlos Narváez — the ump called it a ball, the robot ruled strike (OVERTURNED — ump overruled).2Challenge 3: Carlos Narváez — the ump called it a strike, the robot ruled ball (OVERTURNED — ump overruled).3Challenge 4: Willson Contreras — the ump called it a strike, the robot ruled strike (upheld — ump confirmed).4Challenge 5: Gunnar Henderson — the ump called it a strike, the robot ruled ball (OVERTURNED — ump overruled).5Challenge 6: Jarren Duran — the ump called it a strike, the robot ruled strike (upheld — ump confirmed).6Challenge 7: Samuel Basallo — the ump called it a strike, the robot ruled ball (OVERTURNED — ump overruled).7
strike called ballball called strikeABS overturnedABS upheld

The calls that moved the game

  1. 1+0.20▲1 · 2-1 strike called ball· challenged ✓
    Jackson Holliday vs Brayan Bello
  2. 2-0.09▼3 · 0-0 ball called strike· challenged ✓
    Carlos Narváez vs Trevor Rogers
  3. 3+0.09▼3 · 0-0 strike called ball
    Connor Wong vs Trevor Rogers

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

  1. 1Carlos Narváez — ump said ball, robot ruled strike: overturned.
  2. 2Carlos Narváez — ump said ball, robot ruled strike: overturned.
  3. 3Carlos Narváez — ump said strike, robot ruled ball: overturned.
  4. 4Willson Contreras — ump said strike, robot ruled strike: upheld.
  5. 5Gunnar Henderson — ump said strike, robot ruled ball: overturned.
  6. 6Jarren Duran — ump said strike, robot ruled strike: upheld.
  7. 7Samuel Basallo — ump said strike, robot ruled ball: overturned.

Our tracked-rulebook zone matched the ABS ruling on 6 of 7 — a zone-definition gap (ABS grades a standardized, height-based zone), not our error.

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