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Blue Notes · Umpire Grade2026-04-20

BAL @ KC

Home plate: Quinn Wolcott

“Down the middle. Both dugouts had the same zone.”

B
Umpire Grade
92.5% accurate
0.2
Run Favor
runs, KC
2
ABS Overturns
of 7 reviewed

What this shows — how Quinn Wolcott called the 227 pitches that were taken (no swing), graded against the tracked rulebook strike zone. He got 210 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: Carter Jensen — the ump called it a ball, the robot ruled strike (OVERTURNED — ump overruled).1Challenge 2: Pete Alonso — the ump called it a strike, the robot ruled strike (upheld — ump confirmed).2Challenge 3: Carter Jensen — the ump called it a ball, the robot ruled strike (OVERTURNED — ump overruled).3Challenge 4: Carter Jensen — the ump called it a ball, the robot ruled ball (upheld — ump confirmed).4Challenge 5: Taylor Ward — the ump called it a strike, the robot ruled strike (upheld — ump confirmed).5Challenge 6: Carter Jensen — the ump called it a ball, the robot ruled ball (upheld — ump confirmed).6Challenge 7: Gunnar Henderson — the ump called it a strike, the robot ruled strike (upheld — ump confirmed).7
strike called ballball called strikeABS overturnedABS upheld

The calls that moved the game

  1. 1+0.69▲1 · 3-2 strike called ball
    Gunnar Henderson vs Seth Lugo
  2. 2-0.39▲7 · 2-2 ball called strike
    Dylan Beavers vs Seth Lugo
  3. 3-0.30▼7 · 3-1 ball called strike
    Isaac Collins vs Grant Wolfram

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

  1. 1Carter Jensen — ump said ball, robot ruled strike: overturned.
  2. 2Pete Alonso — ump said strike, robot ruled strike: upheld.
  3. 3Carter Jensen — ump said ball, robot ruled strike: overturned.
  4. 4Carter Jensen — ump said ball, robot ruled ball: upheld.
  5. 5Taylor Ward — ump said strike, robot ruled strike: upheld.
  6. 6Carter Jensen — ump said ball, robot ruled ball: upheld.
  7. 7Gunnar Henderson — ump said strike, robot ruled strike: upheld.

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

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