Blue Notes · Umpire Grade2026-05-12
STL @ ATH
Home plate: Chad Fairchild
“Two dugouts, and only one of them smiling.”
Umpire Grade
90.3% accurate
Run Favor
runs, ATH
ABS Overturns
of 3 reviewed
What this shows — how Chad Fairchild called the 176 pitches that were taken (no swing), graded against the tracked rulebook strike zone. He got 159 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▼3 · 3-2 strike called ball
Carlos Cortes vs Andre Pallante - 2-0.39▲3 · 2-2 ball called strike
Nathan Church vs Jeffrey Springs - 3-0.28▼4 · 1-2 ball called strike
Darell Hernaiz vs Andre Pallante
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.
- 1Shea Langeliers — ump said strike, robot ruled ball: overturned.
- 2Iván Herrera — ump said strike, robot ruled ball: overturned.
- 3Iván Herrera — 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.