Blue Notes · Umpire Grade2026-04-04
SD @ BOS
Home plate: Erich Bacchus
“A small strike zone, generously enforced for the offense.”
Umpire Grade
92.7% accurate
Run Favor
runs, SD
ABS Overturns
of 2 reviewed
What this shows — how Erich Bacchus called the 151 pitches that were taken (no swing), graded against the tracked rulebook strike zone. He got 140 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▲2 · 3-1 strike called ball
Freddy Fermin vs Connelly Early - 2+0.28▲2 · 1-2 strike called ball· challenged
Bryce Johnson vs Connelly Early - 3+0.23▼2 · 0-2 strike called ball
Marcelo Mayer vs Randy Vásquez
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 · 0 overturned (ump overruled) · 2 upheld (ump confirmed). This is Hawkeye ground truth, no model involved.
- 1Carlos Narváez — ump said ball, robot ruled ball: upheld.
- 2Freddy Fermin — ump said ball, robot ruled ball: upheld.
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.