Blue Notes · Umpire Grade2026-06-19
PIT @ COL
Home plate: Clint Vondrak
“The zone kept its promises.”
Umpire Grade
94.7% accurate
Run Favor
runs, PIT
ABS Overturns
of 4 reviewed
What this shows — how Clint Vondrak called the 95 pitches that were taken (no swing), graded against the tracked rulebook strike zone. He got 90 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 strike called ball· challenged
TJ Rumfield vs Mason Montgomery - 2-0.09▼1 · 0-0 ball called strike
Willi Castro vs Bubba Chandler - 3-0.09▼5 · 0-0 ball called strike
Willi Castro vs Bubba Chandler
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
4 pitches went to the robots · 2 overturned (ump overruled) · 2 upheld (ump confirmed). This is the ABS system’s own measurement — Hawk-Eye optical ball-tracking, not our model.
- 1Endy Rodríguez — ump said ball, robot ruled strike: overturned.
- 2Sterlin Thompson — ump said strike, robot ruled strike: upheld.
- 3Ryan O'Hearn — ump said strike, robot ruled ball: overturned.
- 4Endy Rodríguez — ump said ball, robot ruled ball: upheld.
Our tracked-rulebook zone matched the ABS ruling on 2 of 4 — a zone-definition gap (ABS grades a standardized, height-based zone), not our error.