Blue Notes · Umpire Grade2026-05-18
ATL @ MIA
Home plate: Alfonso Márquez
“Solid and unspectacular — exactly what the job asks.”
Umpire Grade
97.0% accurate
Run Favor
runs, MIA
ABS Overturns
of 4 reviewed
What this shows — how Alfonso Márquez called the 168 pitches that were taken (no swing), graded against the tracked rulebook strike zone. He got 163 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+0.19▼5 · 2-0 strike called ball
Connor Norby vs Aaron Bummer - 2-0.19▼8 · 2-0 ball called strike
Owen Caissie vs Jorge Mateo - 3-0.13▼3 · 1-0 ball called strike
Xavier Edwards vs JR Ritchie
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 · 3 overturned (ump overruled) · 1 upheld (ump confirmed). This is Hawkeye ground truth, no model involved.
- 1Drake Baldwin — ump said strike, robot ruled ball: overturned.
- 2Joe Mack — ump said strike, robot ruled ball: overturned.
- 3Joe Mack — ump said strike, robot ruled ball: overturned.
- 4Joe Mack — ump said ball, robot ruled ball: upheld.
Our tracked-rulebook zone matched the ABS ruling on 1 of 4 — a zone-definition gap (ABS grades a standardized, height-based zone), not our error.