Blue Notes · Umpire Grade2026-04-29
AZ @ MIL
Home plate: Alfonso Márquez
“Pitchers earned every strike the hard way.”
Umpire Grade
93.7% accurate
Run Favor
runs, MIL
ABS Overturns
of 4 reviewed
What this shows — how Alfonso Márquez called the 191 pitches that were taken (no swing), graded against the tracked rulebook strike zone. He got 179 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+0.39▲4 · 2-2 strike called ball
Alek Thomas vs Brandon Sproat - 2+0.30▼1 · 3-1 strike called ball
Gary Sánchez vs Eduardo Rodriguez - 3-0.30▼3 · 3-1 ball called strike
Jake Bauers vs Eduardo Rodriguez
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 Hawkeye ground truth, no model involved.
- 1Gary Sánchez — ump said strike, robot ruled strike: upheld.
- 2Greg Jones — ump said strike, robot ruled strike: upheld.
- 3Adrian Del Castillo — ump said strike, robot ruled ball: overturned.
- 4Adrian Del Castillo — ump said strike, robot ruled ball: overturned.
Our tracked-rulebook zone matched the ABS ruling on 2 of 4 — a zone-definition gap (ABS grades a standardized, height-based zone), not our error.