Blue Notes · Umpire Grade2026-05-30
“Solid and unspectacular — exactly what the job asks.”
Umpire Grade
93.5% accurate
Run Favor
runs, PIT
ABS Overturns
of 1 reviewed
What this shows — how Alex Tosi called the 168 pitches that were taken (no swing), graded against the tracked rulebook strike zone. He got 157 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
- 1-0.39▲6 · 2-2 ball called strike
Byron Buxton vs Evan Sisk - 2-0.13▼4 · 1-1 ball called strike
Brandon Lowe vs Bailey Ober - 3-0.13▼7 · 1-1 ball called strike
Spencer Horwitz vs John Klein
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
1 pitch went to the robots · 0 overturned (ump overruled) · 1 upheld (ump confirmed). This is the ABS system’s own measurement — Hawk-Eye optical ball-tracking, not our model.
- 1Victor Caratini — ump said ball, robot ruled ball: upheld.
Our tracked-rulebook zone matched the ABS ruling on 1 of 1 — a zone-definition gap (ABS grades a standardized, height-based zone), not our error.