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Blue Notes · Umpire Grade2026-07-28

BOS @ ATH

Home plate: Mark Wegner

“ABS had a long evening on this one.”

A
Umpire Grade
95.5% accurate
0.5
Run Favor
runs, ATH
6
ABS Overturns
of 9 reviewed

What this shows — how Mark Wegner called the 134 pitches that were taken (no swing), graded against the tracked rulebook strike zone. He got 128 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: Carlos Narváez — the ump called it a strike, the robot ruled ball (OVERTURNED — ump overruled).1Challenge 2: Carlos Narváez — the ump called it a strike, the robot ruled ball (OVERTURNED — ump overruled).2Challenge 3: Carlos Narváez — the ump called it a strike, the robot ruled ball (OVERTURNED — ump overruled).3Challenge 4: Henry Bolte — the ump called it a ball, the robot ruled strike (OVERTURNED — ump overruled).4Challenge 5: Brian Serven — the ump called it a strike, the robot ruled ball (OVERTURNED — ump overruled).5Challenge 6: Brian Serven — the ump called it a ball, the robot ruled ball (upheld — ump confirmed).6Challenge 7: Hogan Harris — the ump called it a strike, the robot ruled ball (OVERTURNED — ump overruled).7Challenge 8: Andruw Monasterio — the ump called it a strike, the robot ruled strike (upheld — ump confirmed).8Challenge 9: Hogan Harris — the ump called it a ball, the robot ruled ball (upheld — ump confirmed).9
strike called ballball called strikeABS overturnedABS upheld

The calls that moved the game

  1. 1+0.69▼7 · 3-2 strike called ball· challenged ✓
    Henry Bolte vs Jake Bennett
  2. 2+0.30▲2 · 3-1 strike called ball
    Andruw Monasterio vs Gage Jump
  3. 3+0.28▼2 · 1-2 strike called ball
    Tyler Soderstrom vs Jake Bennett

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

9 pitches went to the robots · 6 overturned (ump overruled) · 3 upheld (ump confirmed). This is the ABS system’s own measurement — Hawk-Eye optical ball-tracking, not our model.

  1. 1Carlos Narváez — ump said strike, robot ruled ball: overturned.
  2. 2Carlos Narváez — ump said strike, robot ruled ball: overturned.
  3. 3Carlos Narváez — ump said strike, robot ruled ball: overturned.
  4. 4Henry Bolte — ump said ball, robot ruled strike: overturned.
  5. 5Brian Serven — ump said strike, robot ruled ball: overturned.
  6. 6Brian Serven — ump said ball, robot ruled ball: upheld.
  7. 7Hogan Harris — ump said strike, robot ruled ball: overturned.
  8. 8Andruw Monasterio — ump said strike, robot ruled strike: upheld.
  9. 9Hogan Harris — ump said ball, robot ruled ball: upheld.

Our tracked-rulebook zone matched the ABS ruling on 3 of 9 — a zone-definition gap (ABS grades a standardized, height-based zone), not our error.

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