Blue Notes · Umpire Grade2026-07-17
MIA @ MIL
Home plate: Nick Mahrley
“The zone stretched its legs.”
Umpire Grade
87.4% accurate
Run Favor
runs, MIA
ABS Overturns
of 5 reviewed
What this shows — how Nick Mahrley called the 182 pitches that were taken (no swing), graded against the tracked rulebook strike zone. He got 159 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
Otto Lopez vs Logan Henderson - 2-0.28▲6 · 1-2 ball called strike· challenged ✓
Xavier Edwards vs Chad Patrick - 3+0.23▲4 · 0-2 strike called ball
Xavier Edwards vs Logan Henderson
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
5 pitches went to the robots · 3 overturned (ump overruled) · 2 upheld (ump confirmed). This is the ABS system’s own measurement — Hawk-Eye optical ball-tracking, not our model.
- 1Xavier Edwards — ump said strike, robot ruled ball: overturned.
- 2Joe Mack — ump said strike, robot ruled strike: upheld.
- 3Joe Mack — ump said ball, robot ruled strike: overturned.
- 4William Contreras — ump said ball, robot ruled strike: overturned.
- 5Joe Mack — ump said ball, robot ruled ball: upheld.
Our tracked-rulebook zone matched the ABS ruling on 5 of 5 — a zone-definition gap (ABS grades a standardized, height-based zone), not our error.