Blue Notes · Umpire Grade2026-05-06
MIL @ STL
Home plate: Mike Muchlinski
“Down the middle. Both dugouts had the same zone.”
Umpire Grade
93.8% accurate
Run Favor
runs, STL
ABS Overturns
of 3 reviewed
What this shows — how Mike Muchlinski called the 178 pitches that were taken (no swing), graded against the tracked rulebook strike zone. He got 167 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+0.20▼1 · 2-1 strike called ball
Jordan Walker vs Brandon Sproat - 2-0.20▼8 · 2-1 ball called strike
Iván Herrera vs Trevor Megill - 3-0.19▼1 · 2-0 ball called strike
Alec Burleson vs Brandon Sproat
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
3 pitches went to the robots · 2 overturned (ump overruled) · 1 upheld (ump confirmed). This is Hawkeye ground truth, no model involved.
- 1Alec Burleson — ump said ball, robot ruled strike: overturned.
- 2William Contreras — ump said strike, robot ruled ball: overturned.
- 3Iván Herrera — ump said strike, robot ruled strike: upheld.
Our tracked-rulebook zone matched the ABS ruling on 1 of 3 — a zone-definition gap (ABS grades a standardized, height-based zone), not our error.