Blue Notes · Umpire Grade2026-05-26
AZ @ SF
Home plate: Sean Barber
“The zone leaned, and the ledger noticed.”
Umpire Grade
94.0% accurate
Run Favor
runs, AZ
ABS Overturns
of 4 reviewed
What this shows — how Sean Barber called the 166 pitches that were taken (no swing), graded against the tracked rulebook strike zone. He got 156 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
- 1-0.69▼6 · 3-2 ball called strike
Bryce Eldridge vs Eduardo Rodriguez - 2+0.19▲2 · 2-0 strike called ball
Nolan Arenado vs Tyler Mahle - 3+0.13▲1 · 1-1 strike called ball
Corbin Carroll vs Tyler Mahle
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
4 pitches went to the robots · 1 overturned (ump overruled) · 3 upheld (ump confirmed). This is Hawkeye ground truth, no model involved.
- 1Gabriel Moreno — ump said ball, robot ruled ball: upheld.
- 2Rafael Devers — ump said strike, robot ruled strike: upheld.
- 3Ryan Waldschmidt — ump said strike, robot ruled strike: upheld.
- 4Matt Chapman — ump said ball, robot ruled strike: overturned.
Our tracked-rulebook zone matched the ABS ruling on 3 of 4 — a zone-definition gap (ABS grades a standardized, height-based zone), not our error.