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Blue Notes · Umpire Grade2026-03-30

ATH @ ATL

Home plate: Dan Bellino

“The Automated Ball-Strike System put in some overtime here.”

B+
Umpire Grade
93.4% accurate
0.3
Run Favor
runs, ATL
5
ABS Overturns
of 6 reviewed

What this shows — how Dan Bellino called the 137 pitches that were taken (no swing), graded against the tracked rulebook strike zone. He got 128 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: Nick Kurtz — the ump called it a strike, the robot ruled ball (OVERTURNED — ump overruled).1Challenge 2: Max Muncy — the ump called it a strike, the robot ruled ball (OVERTURNED — ump overruled).2Challenge 3: Jonah Heim — the ump called it a ball, the robot ruled strike (OVERTURNED — ump overruled).3Challenge 4: Jonah Heim — the ump called it a ball, the robot ruled ball (upheld — ump confirmed).4Challenge 5: Jonah Heim — the ump called it a ball, the robot ruled strike (OVERTURNED — ump overruled).5Challenge 6: Shea Langeliers — the ump called it a ball, the robot ruled strike (OVERTURNED — ump overruled).6
strike called ballball called strikeABS overturnedABS upheld

The calls that moved the game

  1. 1+0.28▲7 · 1-2 strike called ball· challenged ✓
    Lawrence Butler vs Aaron Bummer
  2. 2-0.23▲1 · 0-2 ball called strike· challenged ✓
    Nick Kurtz vs Bryce Elder
  3. 3+0.23▼1 · 0-2 strike called ball
    Michael Harris II vs Jacob Lopez

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

  1. 1Nick Kurtz — ump said strike, robot ruled ball: overturned.
  2. 2Max Muncy — ump said strike, robot ruled ball: overturned.
  3. 3Jonah Heim — ump said ball, robot ruled strike: overturned.
  4. 4Jonah Heim — ump said ball, robot ruled ball: upheld.
  5. 5Jonah Heim — ump said ball, robot ruled strike: overturned.
  6. 6Shea Langeliers — ump said ball, robot ruled strike: 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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