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Blue Notes · Umpire Grade2026-09-12

CWS @ STL

Home plate: Alfonso Márquez

“Two dugouts, and only one of them smiling.”

B-
Umpire Grade
91.8% accurate
1.0
Run Favor
runs, CWS
4
ABS Overturns
of 8 reviewed

What this shows — how Alfonso Márquez called the 196 pitches that were taken (no swing), graded against the tracked rulebook strike zone. He got 180 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: Munetaka Murakami — the ump called it a strike, the robot ruled strike (upheld — ump confirmed).1Challenge 2: José Fermín — the ump called it a strike, the robot ruled strike (upheld — ump confirmed).2Challenge 3: Leo Bernal — the ump called it a ball, the robot ruled strike (OVERTURNED — ump overruled).3Challenge 4: Kyle Teel — the ump called it a ball, the robot ruled ball (upheld — ump confirmed).4Challenge 5: Leo Bernal — the ump called it a ball, the robot ruled strike (OVERTURNED — ump overruled).5Challenge 6: Masyn Winn — the ump called it a strike, the robot ruled ball (OVERTURNED — ump overruled).6Challenge 7: Leo Bernal — the ump called it a ball, the robot ruled strike (OVERTURNED — ump overruled).7Challenge 8: Leo Bernal — the ump called it a ball, the robot ruled ball (upheld — ump confirmed).8
strike called ballball called strikeABS overturnedABS upheld

The calls that moved the game

  1. 1-0.69▼7 · 3-2 ball called strike
    José Fermín vs Grant Taylor
  2. 2+0.28▲9 · 1-2 strike called ball· challenged ✓
    Miguel Vargas vs Riley O'Brien
  3. 3+0.23▲4 · 0-2 strike called ball· challenged ✓
    Miguel Vargas vs Cooper Hjerpe

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

8 pitches went to the robots · 4 overturned (ump overruled) · 4 upheld (ump confirmed). This is the ABS system’s own measurement — Hawk-Eye optical ball-tracking, not our model.

  1. 1Munetaka Murakami — ump said strike, robot ruled strike: upheld.
  2. 2José Fermín — ump said strike, robot ruled strike: upheld.
  3. 3Leo Bernal — ump said ball, robot ruled strike: overturned.
  4. 4Kyle Teel — ump said ball, robot ruled ball: upheld.
  5. 5Leo Bernal — ump said ball, robot ruled strike: overturned.
  6. 6Masyn Winn — ump said strike, robot ruled ball: overturned.
  7. 7Leo Bernal — ump said ball, robot ruled strike: overturned.
  8. 8Leo Bernal — ump said ball, robot ruled ball: upheld.

Our tracked-rulebook zone matched the ABS ruling on 7 of 8 — a zone-definition gap (ABS grades a standardized, height-based zone), not our error.

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