Blue Notes · Umpire Grade2026-08-15
“The zone leaned, and the ledger noticed.”
Umpire Grade
90.0% accurate
Run Favor
runs, AZ
ABS Overturns
of 5 reviewed
What this shows — how Jim Wolf called the 170 pitches that were taken (no swing), graded against the tracked rulebook strike zone. He got 153 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▲9 · 2-1 strike called ball
Nolan Arenado vs Danny Young - 2+0.13▲5 · 1-1 strike called ball· challenged ✓
Nolan Arenado vs Victor Mederos - 3-0.13▲9 · 1-1 ball called strike
Gabriel Moreno vs Danny Young
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 · 2 overturned (ump overruled) · 3 upheld (ump confirmed). This is the ABS system’s own measurement — Hawk-Eye optical ball-tracking, not our model.
- 1Gabriel Moreno — ump said ball, robot ruled ball: upheld.
- 2Sean Murphy — ump said ball, robot ruled strike: overturned.
- 3Sean Murphy — ump said ball, robot ruled strike: overturned.
- 4Sean Murphy — ump said ball, robot ruled ball: upheld.
- 5Sean Murphy — ump said ball, robot ruled ball: upheld.
Our tracked-rulebook zone matched the ABS ruling on 4 of 5 — a zone-definition gap (ABS grades a standardized, height-based zone), not our error.