Blue Notes · Umpire Grade2026-05-15
“The zone kept its promises.”
Umpire Grade
92.9% accurate
Run Favor
runs, CHC
ABS Overturns
of 5 reviewed
What this shows — how Laz Diaz called the 197 pitches that were taken (no swing), graded against the tracked rulebook strike zone. He got 183 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▲9 · 3-1 strike called ball
Michael Busch vs Tyler Schweitzer - 2+0.21▲8 · 3-0 strike called ball
Michael Busch vs Jordan Hicks - 3-0.19▲2 · 2-0 ball called strike
Moisés Ballesteros vs Sean Burke
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.
- 1Miguel Vargas — ump said strike, robot ruled ball: overturned.
- 2Drew Romo — ump said ball, robot ruled strike: overturned.
- 3Drew Romo — ump said ball, robot ruled ball: upheld.
- 4Jordan Hicks — ump said ball, robot ruled ball: upheld.
- 5Carson Kelly — ump said ball, robot ruled ball: upheld.
Our tracked-rulebook zone matched the ABS ruling on 2 of 5 — a zone-definition gap (ABS grades a standardized, height-based zone), not our error.