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Blue Notes · Umpire Grade2026-07-06

HOU @ WSH

Home plate: Dan Merzel

“Hawkeye did more talking than the umpire tonight.”

B
Umpire Grade
92.0% accurate
1.2
Run Favor
runs, WSH
6
ABS Overturns
of 8 reviewed

What this shows — how Dan Merzel called the 163 pitches that were taken (no swing), graded against the tracked rulebook strike zone. He got 150 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: Isaac Paredes — the ump called it a strike, the robot ruled ball (OVERTURNED — ump overruled).1Challenge 2: Isaac Paredes — the ump called it a strike, the robot ruled ball (OVERTURNED — ump overruled).2Challenge 3: Yainer Diaz — the ump called it a ball, the robot ruled strike (OVERTURNED — ump overruled).3Challenge 4: Drew Millas — the ump called it a ball, the robot ruled strike (OVERTURNED — ump overruled).4Challenge 5: Yainer Diaz — the ump called it a ball, the robot ruled strike (OVERTURNED — ump overruled).5Challenge 6: Yainer Diaz — the ump called it a ball, the robot ruled ball (upheld — ump confirmed).6Challenge 7: Drew Millas — the ump called it a ball, the robot ruled strike (OVERTURNED — ump overruled).7Challenge 8: Drew Millas — 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▲1 · 3-2 ball called strike· challenged ✓
    Isaac Paredes vs Miles Mikolas
  2. 2+0.28▼4 · 1-2 strike called ball· challenged
    James Wood vs Mike Burrows
  3. 3+0.23▼2 · 0-2 strike called ball· challenged ✓
    Drew Millas vs Mike Burrows

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

  1. 1Isaac Paredes — ump said strike, robot ruled ball: overturned.
  2. 2Isaac Paredes — ump said strike, robot ruled ball: overturned.
  3. 3Yainer Diaz — ump said ball, robot ruled strike: overturned.
  4. 4Drew Millas — ump said ball, robot ruled strike: overturned.
  5. 5Yainer Diaz — ump said ball, robot ruled strike: overturned.
  6. 6Yainer Diaz — ump said ball, robot ruled ball: upheld.
  7. 7Drew Millas — ump said ball, robot ruled strike: overturned.
  8. 8Drew Millas — 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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