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RECORD: 8 HIT · 12 MISS · 1 OPEN
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Blue Notes · Umpire Grade2026-09-25

CHC @ BOS

Home plate: D.J. Reyburn

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

B+
Umpire Grade
93.1% accurate
0.3
Run Favor
runs, BOS
2
ABS Overturns
of 4 reviewed

What this shows — how D.J. Reyburn called the 145 pitches that were taken (no swing), graded against the tracked rulebook strike zone. He got 135 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: Michael Conforto — the ump called it a strike, the robot ruled ball (OVERTURNED — ump overruled).1Challenge 2: Connor Wong — the ump called it a ball, the robot ruled strike (OVERTURNED — ump overruled).2Challenge 3: Carson Kelly — the ump called it a ball, the robot ruled ball (upheld — ump confirmed).3Challenge 4: Roman Anthony — the ump called it a strike, the robot ruled strike (upheld — ump confirmed).4
strike called ballball called strikeABS overturnedABS upheld

The calls that moved the game

  1. 1+0.28▼2 · 1-2 strike called ball
    Jarren Duran vs David Peterson
  2. 2+0.28▼4 · 1-2 strike called ball
    Andruw Monasterio vs David Peterson
  3. 3-0.19▼5 · 2-0 ball called strike
    Isiah Kiner-Falefa vs David Peterson

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

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

  1. 1Michael Conforto — ump said strike, robot ruled ball: overturned.
  2. 2Connor Wong — ump said ball, robot ruled strike: overturned.
  3. 3Carson Kelly — ump said ball, robot ruled ball: upheld.
  4. 4Roman Anthony — ump said strike, robot ruled strike: upheld.

Our tracked-rulebook zone matched the ABS ruling on 3 of 4 — a zone-definition gap (ABS grades a standardized, height-based zone), not our error.

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