Blue Notes · Umpire Grade2026-04-10
CWS @ KC
Home plate: Tripp Gibson
“The strike zone picked a side, and wasn't shy about it.”
Umpire Grade
96.7% accurate
Run Favor
runs, CWS
ABS Overturns
of 3 reviewed
What this shows — how Tripp Gibson called the 92 pitches that were taken (no swing), graded against the tracked rulebook strike zone. He got 89 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▲1 · 3-2 strike called ball
Miguel Vargas vs Kris Bubic - 2+0.23▲3 · 0-2 strike called ball
Derek Hill vs Kris Bubic - 3+0.09▲2 · 0-0 strike called ball
Luisangel Acuña vs Kris Bubic
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
3 pitches went to the robots · 2 overturned (ump overruled) · 1 upheld (ump confirmed). This is Hawkeye ground truth, no model involved.
- 1Salvador Perez — ump said strike, robot ruled ball: overturned.
- 2Edgar Quero — ump said ball, robot ruled ball: upheld.
- 3Salvador Perez — ump said strike, robot ruled ball: overturned.
Our tracked-rulebook zone matched the ABS ruling on 1 of 3 — a zone-definition gap (ABS grades a standardized, height-based zone), not our error.