Blue Notes · Umpire Grade2026-05-12
PHI @ BOS
Home plate: Dan Merzel
“You could set a watch by that zone.”
Umpire Grade
96.2% accurate
Run Favor
runs, BOS
ABS Overturns
of 2 reviewed
What this shows — how Dan Merzel called the 131 pitches that were taken (no swing), graded against the tracked rulebook strike zone. He got 126 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
strike called ballball called strikeABS overturnedABS upheld
The calls that moved the game
- 1-0.13▲4 · 1-1 ball called strike
J.T. Realmuto vs Brayan Bello - 2-0.13▼8 · 1-0 ball called strike
Mickey Gasper vs José Alvarado - 3+0.10▼7 · 0-1 strike called ball
Trevor Story vs Zack Wheeler
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
2 pitches went to the robots · 1 overturned (ump overruled) · 1 upheld (ump confirmed). This is Hawkeye ground truth, no model involved.
- 1Alec Bohm — ump said ball, robot ruled strike: overturned.
- 2Adolis García — ump said strike, robot ruled strike: upheld.
Our tracked-rulebook zone matched the ABS ruling on 1 of 2 — a zone-definition gap (ABS grades a standardized, height-based zone), not our error.