Blue Notes · Umpire Grade2026-05-01
ATL @ COL
Home plate: Chad Fairchild
“The zone showed up, did the job, and went home. Ideal.”
Umpire Grade
95.7% accurate
Run Favor
runs, COL
ABS Overturns
of 4 reviewed
What this shows — how Chad Fairchild called the 139 pitches that were taken (no swing), graded against the tracked rulebook strike zone. He got 133 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
- 1-0.13▼5 · 1-0 ball called strike
Tyler Freeman vs Grant Holmes - 2-0.13▼6 · 1-0 ball called strike
Edouard Julien vs Anthony Molina - 3-0.13▲9 · 1-0 ball called strike
Ozzie Albies vs Juan Mejia
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.
- 1Jonah Heim — ump said ball, robot ruled ball: upheld.
- 2Hunter Goodman — ump said strike, robot ruled strike: upheld.
- 3Hunter Goodman — ump said strike, robot ruled ball: overturned.
- 4Edouard Julien — ump said strike, robot ruled strike: upheld.
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.