Blue Notes · Umpire Grade2026-04-28
STL @ PIT
Home plate: Erich Bacchus
“Expanded the plate a touch past its 17 inches.”
Umpire Grade
89.5% accurate
Run Favor
runs, STL
ABS Overturns
of 1 reviewed
What this shows — how Erich Bacchus called the 162 pitches that were taken (no swing), graded against the tracked rulebook strike zone. He got 145 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▼8 · 2-2 ball called strike
Nick Yorke vs Justin Bruihl - 2-0.28▼3 · 1-2 ball called strike
Brandon Lowe vs Kyle Leahy - 3-0.20▼5 · 2-1 ball called strike
Spencer Horwitz vs Kyle Leahy
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 Hawkeye ground truth, no model involved.
- 1Oneil Cruz — ump said strike, robot ruled strike: 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.