Blue Notes · Umpire Grade2026-04-25
LAA @ KC
Home plate: Derek Thomas
“The zone shrank when the pitchers needed it most.”
Umpire Grade
90.4% accurate
Run Favor
runs, KC
ABS Overturns
of 5 reviewed
What this shows — how Derek Thomas called the 187 pitches that were taken (no swing), graded against the tracked rulebook strike zone. He got 169 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▲2 · 2-2 strike called ball
Oswald Peraza vs Cole Ragans - 2+0.39▼4 · 2-2 strike called ball· challenged
Vinnie Pasquantino vs Walbert Ureña - 3+0.28▲2 · 1-2 strike called ball
Oswald Peraza vs Cole Ragans
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
5 pitches went to the robots · 1 overturned (ump overruled) · 4 upheld (ump confirmed). This is Hawkeye ground truth, no model involved.
- 1Isaac Collins — ump said ball, robot ruled strike: overturned.
- 2Logan O'Hoppe — ump said ball, robot ruled ball: upheld.
- 3Nick Loftin — ump said strike, robot ruled strike: upheld.
- 4Carter Jensen — ump said ball, robot ruled ball: upheld.
- 5Jordan Romano — ump said ball, robot ruled ball: upheld.
Our tracked-rulebook zone matched the ABS ruling on 3 of 5 — a zone-definition gap (ABS grades a standardized, height-based zone), not our error.