Blue Notes · Umpire Grade2026-03-26
TB @ STL
Home plate: Chris Guccione
“The zone kept its promises.”
Umpire Grade
95.5% accurate
Run Favor
runs, STL
ABS Overturns
of 3 reviewed
What this shows — how Chris Guccione called the 154 pitches that were taken (no swing), graded against the tracked rulebook strike zone. He got 147 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▼1 · 2-2 strike called ball
JJ Wetherholt vs Drew Rasmussen - 2-0.21▼3 · 3-0 ball called strike
Alec Burleson vs Drew Rasmussen - 3-0.13▲3 · 1-1 ball called strike
Ben Williamson vs Matthew Liberatore
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
3 pitches went to the robots · 2 overturned (ump overruled) · 1 upheld (ump confirmed). This is Hawkeye ground truth, no model involved.
- 1Nick Fortes — ump said strike, robot ruled ball: overturned.
- 2Jonathan Aranda — ump said ball, robot ruled strike: overturned.
- 3Pedro Pagés — ump said ball, robot ruled ball: upheld.
Our tracked-rulebook zone matched the ABS ruling on 1 of 3 — a zone-definition gap (ABS grades a standardized, height-based zone), not our error.