Blue Notes · Umpire Grade2026-05-07
“An honest evening's grade: nothing loud, nothing missed by much.”
Umpire Grade
92.7% accurate
Run Favor
runs, STL
ABS Overturns
of 2 reviewed
What this shows — how Alex Tosi called the 124 pitches that were taken (no swing), graded against the tracked rulebook strike zone. He got 115 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▲1 · 3-1 strike called ball
Alec Burleson vs Michael King - 2+0.21▼5 · 3-0 strike called ball
Ramón Laureano vs Matthew Liberatore - 3+0.13▲1 · 1-1 strike called ball
Iván Herrera vs Michael King
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
2 pitches went to the robots · 1 overturned (ump overruled) · 1 upheld (ump confirmed). This is Hawkeye ground truth, no model involved.
- 1Ramón Laureano — ump said strike, robot ruled strike: upheld.
- 2Pedro Pagés — ump said strike, robot ruled ball: overturned.
Our tracked-rulebook zone matched the ABS ruling on 1 of 2 — a zone-definition gap (ABS grades a standardized, height-based zone), not our error.