Blue Notes · Umpire Grade2026-04-01
LAA @ CHC
Home plate: David Rackley
“Nothing that'll trend, and on this beat that's a compliment.”
Umpire Grade
93.2% accurate
Run Favor
runs, LAA
ABS Overturns
of 4 reviewed
What this shows — how David Rackley called the 148 pitches that were taken (no swing), graded against the tracked rulebook strike zone. He got 138 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▲5 · 2-2 strike called ball
Oswald Peraza vs Matthew Boyd - 2+0.39▼7 · 2-2 strike called ball
Michael Busch vs Brent Suter - 3+0.28▲2 · 1-2 strike called ball
Yoán Moncada vs Matthew Boyd
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.
- 1Dansby Swanson — ump said strike, robot ruled strike: upheld.
- 2Carson Kelly — ump said strike, robot ruled ball: overturned.
- 3Oswald Peraza — ump said strike, robot ruled strike: upheld.
- 4Zach Neto — 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.