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Blue Notes · Umpire Grade2026-07-29

BOS @ ATH

Home plate: Bruce Dreckman

“An honest evening's grade: nothing loud, nothing missed by much.”

B+
Umpire Grade
93.8% accurate
0.4
Run Favor
runs, ATH
4
ABS Overturns
of 7 reviewed

What this shows — how Bruce Dreckman called the 160 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: Willson Contreras — the ump called it a strike, the robot ruled ball (OVERTURNED — ump overruled).1Challenge 2: Andruw Monasterio — the ump called it a strike, the robot ruled strike (upheld — ump confirmed).2Challenge 3: Jonah Heim — the ump called it a ball, the robot ruled strike (OVERTURNED — ump overruled).3Challenge 4: Connor Wong — the ump called it a ball, the robot ruled strike (OVERTURNED — ump overruled).4Challenge 5: Carlos Cortes — the ump called it a strike, the robot ruled strike (upheld — ump confirmed).5Challenge 6: Carlos Narváez — the ump called it a ball, the robot ruled strike (OVERTURNED — ump overruled).6Challenge 7: Carlos Narváez — the ump called it a ball, the robot ruled ball (upheld — ump confirmed).7
strike called ballball called strikeABS overturnedABS upheld

The calls that moved the game

  1. 1+0.39▼5 · 2-2 strike called ball· challenged ✓
    Tyler Soderstrom vs Patrick Sandoval
  2. 2+0.23▼8 · 0-2 strike called ball· challenged ✓
    Carlos Cortes vs Garrett Whitlock
  3. 3-0.20▲1 · 2-1 ball called strike· challenged ✓
    Willson Contreras vs Jacob Lopez

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

  1. 1Willson Contreras — ump said strike, robot ruled ball: overturned.
  2. 2Andruw Monasterio — ump said strike, robot ruled strike: upheld.
  3. 3Jonah Heim — ump said ball, robot ruled strike: overturned.
  4. 4Connor Wong — ump said ball, robot ruled strike: overturned.
  5. 5Carlos Cortes — ump said strike, robot ruled strike: upheld.
  6. 6Carlos Narváez — ump said ball, robot ruled strike: overturned.
  7. 7Carlos Narváez — ump said ball, robot ruled ball: upheld.

Our tracked-rulebook zone matched the ABS ruling on 6 of 7 — a zone-definition gap (ABS grades a standardized, height-based zone), not our error.

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