Blue Notes · Umpire Grade2026-05-03
KC @ SEA
Home plate: Clint Vondrak
“A pitcher's-nightmare zone — you had to paint it to get it.”
Umpire Grade
90.7% accurate
Run Favor
runs, KC
ABS Overturns
of 5 reviewed
What this shows — how Clint Vondrak called the 140 pitches that were taken (no swing), graded against the tracked rulebook strike zone. He got 127 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▼2 · 3-2 strike called ball
Connor Joe vs Kris Bubic - 2-0.69▼3 · 3-2 ball called strike
Rob Refsnyder vs Kris Bubic - 3+0.20▲3 · 2-1 strike called ball
Maikel Garcia vs Luis Castillo
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 · 3 overturned (ump overruled) · 2 upheld (ump confirmed). This is Hawkeye ground truth, no model involved.
- 1Maikel Garcia — ump said ball, robot ruled strike: overturned.
- 2Jhonny Pereda — ump said ball, robot ruled ball: upheld.
- 3Carter Jensen — ump said strike, robot ruled ball: overturned.
- 4Carter Jensen — ump said strike, robot ruled ball: overturned.
- 5Josh Naylor — ump said strike, robot ruled strike: 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.