Blue Notes · Umpire Grade2026-04-29
“Down the middle. Both dugouts had the same zone.”
Umpire Grade
92.4% accurate
Run Favor
runs, STL
ABS Overturns
of 5 reviewed
What this shows — how Laz Diaz called the 172 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+0.23▲3 · 0-2 strike called ball
Ramón Urías vs Bubba Chandler - 2+0.23▲9 · 0-2 strike called ball· challenged ✓
Victor Scott II vs Yohan Ramírez - 3-0.20▼6 · 2-1 ball called strike
Bryan Reynolds vs Andre Pallante
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.
- 1Iván Herrera — ump said ball, robot ruled strike: overturned.
- 2Iván Herrera — ump said strike, robot ruled ball: overturned.
- 3Iván Herrera — ump said ball, robot ruled ball: upheld.
- 4Iván Herrera — ump said ball, robot ruled ball: upheld.
- 5Henry Davis — ump said ball, robot ruled strike: overturned.
Our tracked-rulebook zone matched the ABS ruling on 3 of 5 — a zone-definition gap (ABS grades a standardized, height-based zone), not our error.