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Blue Notes · Umpire Grade2026-05-24

ATH @ SD

Home plate: James Jean

“The zone kept its promises.”

B+
Umpire Grade
93.1% accurate
1.0
Run Favor
runs, ATH
2
ABS Overturns
of 5 reviewed

What this shows — how James Jean called the 188 pitches that were taken (no swing), graded against the tracked rulebook strike zone. He got 175 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: Rodolfo Durán — the ump called it a ball, the robot ruled ball (upheld — ump confirmed).1Challenge 2: Jonah Heim — the ump called it a ball, the robot ruled strike (OVERTURNED — ump overruled).2Challenge 3: Mark Leiter Jr. — the ump called it a ball, the robot ruled ball (upheld — ump confirmed).3Challenge 4: Jackson Merrill — the ump called it a strike, the robot ruled ball (OVERTURNED — ump overruled).4Challenge 5: Hogan Harris — the ump called it a ball, the robot ruled ball (upheld — ump confirmed).5
strike called ballball called strikeABS overturnedABS upheld

The calls that moved the game

  1. 1+0.69▲9 · 3-2 strike called ball
    Jonah Heim vs Bradgley Rodriguez
  2. 2+0.28▲3 · 1-2 strike called ball
    Nick Kurtz vs Michael King
  3. 3+0.28▲4 · 1-2 strike called ball
    Alika Williams vs Michael King

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

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

  1. 1Rodolfo Durán — ump said ball, robot ruled ball: upheld.
  2. 2Jonah Heim — ump said ball, robot ruled strike: overturned.
  3. 3Mark Leiter Jr. — ump said ball, robot ruled ball: upheld.
  4. 4Jackson Merrill — ump said strike, robot ruled ball: overturned.
  5. 5Hogan Harris — ump said ball, robot ruled ball: upheld.

Our tracked-rulebook zone matched the ABS ruling on 4 of 5 — a zone-definition gap (ABS grades a standardized, height-based zone), not our error.

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