Blue Notes · Umpire Grade2026-06-14
CHC @ SF
Home plate: Clint Vondrak
“Called a fair game and let the players decide it.”
Umpire Grade
96.5% accurate
Run Favor
runs, CHC
ABS Overturns
of 1 reviewed
What this shows — how Clint Vondrak called the 143 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+0.23▲7 · 0-2 strike called ball
Michael Conforto vs Logan Webb - 2-0.09▼2 · 0-0 ball called strike
Casey Schmitt vs Colin Rea - 3+0.09▲4 · 0-0 strike called ball
Michael Busch vs Logan Webb
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.
- 1Michael Conforto — 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.