Blue Notes · Umpire Grade2026-04-12
HOU @ SEA
Home plate: Clint Vondrak
“The catcher barely had to sell a thing.”
Umpire Grade
97.3% accurate
Run Favor
runs, SEA
ABS Overturns
of 1 reviewed
What this shows — how Clint Vondrak called the 147 pitches that were taken (no swing), graded against the tracked rulebook strike zone. He got 143 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+0.19▼3 · 2-0 strike called ball
Cole Young vs Jayden Murray - 2-0.13▼8 · 1-0 ball called strike
Randy Arozarena vs Bryan Abreu - 3+0.10▼4 · 0-1 strike called ball
Julio Rodríguez vs Christian Roa
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
1 pitch went to the robots · 0 overturned (ump overruled) · 1 upheld (ump confirmed). This is Hawkeye ground truth, no model involved.
- 1Josh Naylor — ump said strike, robot ruled strike: upheld.
Our tracked-rulebook zone matched the ABS ruling on 1 of 1 — a zone-definition gap (ABS grades a standardized, height-based zone), not our error.