Blue Notes · Umpire Grade2026-04-07
PHI @ SF
Home plate: Clint Vondrak
“A steady night's work behind the plate.”
Umpire Grade
93.8% accurate
Run Favor
runs, PHI
ABS Overturns
of 1 reviewed
What this shows — how Clint Vondrak called the 146 pitches that were taken (no swing), graded against the tracked rulebook strike zone. He got 137 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
- 1-0.13▼8 · 1-1 ball called strike
Harrison Bader vs Orion Kerkering - 2-0.13▼1 · 1-0 ball called strike
Willy Adames vs Cristopher Sánchez - 3+0.13▲6 · 1-0 strike called ball
Bryce Harper vs Robbie Ray
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 · 1 overturned (ump overruled) · 0 upheld (ump confirmed). This is Hawkeye ground truth, no model involved.
- 1Jerar Encarnacion — ump said ball, robot ruled strike: overturned.
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.