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Blue Notes · Umpire Grade2026-05-13

CHC @ ATL

Home plate: Sean Barber

“Hawkeye clocked in early and stayed late.”

B
Umpire Grade
92.7% accurate
0.2
Run Favor
runs, CHC
5
ABS Overturns
of 6 reviewed

What this shows — how Sean Barber called the 136 pitches that were taken (no swing), graded against the tracked rulebook strike zone. He got 126 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: Sandy León — the ump called it a ball, the robot ruled ball (upheld — ump confirmed).1Challenge 2: Carson Kelly — the ump called it a ball, the robot ruled strike (OVERTURNED — ump overruled).2Challenge 3: Sandy León — the ump called it a ball, the robot ruled strike (OVERTURNED — ump overruled).3Challenge 4: Sandy León — the ump called it a ball, the robot ruled strike (OVERTURNED — ump overruled).4Challenge 5: Ian Happ — the ump called it a strike, the robot ruled ball (OVERTURNED — ump overruled).5Challenge 6: Michael Busch — 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+0.39▲7 · 2-2 strike called ball· challenged ✓
    Pete Crow-Armstrong vs Dylan Lee
  2. 2+0.28▼6 · 1-2 strike called ball· challenged ✓
    José Azócar vs Shota Imanaga
  3. 3+0.23▲8 · 0-2 strike called ball
    Moisés Ballesteros vs Robert 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 · 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. 1Sandy León — ump said ball, robot ruled ball: upheld.
  2. 2Carson Kelly — ump said ball, robot ruled strike: overturned.
  3. 3Sandy León — ump said ball, robot ruled strike: overturned.
  4. 4Sandy León — ump said ball, robot ruled strike: overturned.
  5. 5Ian Happ — ump said strike, robot ruled ball: overturned.
  6. 6Michael Busch — ump said strike, robot ruled ball: overturned.

Our tracked-rulebook zone matched the ABS ruling on 4 of 6 — a zone-definition gap (ABS grades a standardized, height-based zone), not our error.

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