Blue Notes · Umpire Grade2026-03-30
WSH @ PHI
Home plate: Nick Mahrley
“A steady night's work behind the plate.”
Umpire Grade
95.8% accurate
Run Favor
runs, PHI
ABS Overturns
of 3 reviewed
What this shows — how Nick Mahrley called the 165 pitches that were taken (no swing), graded against the tracked rulebook strike zone. He got 158 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
- 1-0.30▲5 · 3-1 ball called strike
James Wood vs Taijuan Walker - 2-0.09▲2 · 0-0 ball called strike
Brady House vs Taijuan Walker - 3+0.09▼2 · 0-0 strike called ball
Otto Kemp vs Foster Griffin
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 · 1 overturned (ump overruled) · 2 upheld (ump confirmed). This is Hawkeye ground truth, no model involved.
- 1Drew Millas — ump said ball, robot ruled ball: upheld.
- 2Kyle Schwarber — ump said ball, robot ruled strike: overturned.
- 3Adolis García — ump said strike, robot ruled strike: upheld.
Our tracked-rulebook zone matched the ABS ruling on 2 of 3 — a zone-definition gap (ABS grades a standardized, height-based zone), not our error.