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Blue Notes · Umpire Grade2026-05-01

LAD @ STL

Home plate: Chris Guccione

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

B
Umpire Grade
92.9% accurate
0.6
Run Favor
runs, STL
5
ABS Overturns
of 7 reviewed

What this shows — how Chris Guccione called the 170 pitches that were taken (no swing), graded against the tracked rulebook strike zone. He got 158 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: Will Smith — the ump called it a ball, the robot ruled strike (OVERTURNED — ump overruled).1Challenge 2: Will Smith — the ump called it a strike, the robot ruled ball (OVERTURNED — ump overruled).2Challenge 3: Pedro Pagés — the ump called it a ball, the robot ruled strike (OVERTURNED — ump overruled).3Challenge 4: Will Smith — the ump called it a ball, the robot ruled strike (OVERTURNED — ump overruled).4Challenge 5: Pedro Pagés — the ump called it a ball, the robot ruled ball (upheld — ump confirmed).5Challenge 6: Andy Pages — the ump called it a strike, the robot ruled strike (upheld — ump confirmed).6Challenge 7: Miguel Rojas — 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+0.28▲8 · 1-2 strike called ball· challenged
    Kyle Tucker vs Gordon Graceffo
  2. 2-0.28▲8 · 1-2 ball called strike· challenged
    Andy Pages vs Gordon Graceffo
  3. 3-0.20▲7 · 2-1 ball called strike
    Max Muncy vs George Soriano

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. 1Will Smith — ump said ball, robot ruled strike: overturned.
  2. 2Will Smith — ump said strike, robot ruled ball: overturned.
  3. 3Pedro Pagés — ump said ball, robot ruled strike: overturned.
  4. 4Will Smith — ump said ball, robot ruled strike: overturned.
  5. 5Pedro Pagés — ump said ball, robot ruled ball: upheld.
  6. 6Andy Pages — ump said strike, robot ruled strike: upheld.
  7. 7Miguel Rojas — ump said strike, robot ruled ball: overturned.

Our tracked-rulebook zone matched the ABS ruling on 4 of 7 — a zone-definition gap (ABS grades a standardized, height-based zone), not our error.

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