Blue Notes · Umpire Grade2026-06-29
SF @ AZ
Home plate: Tripp Gibson
“An honest evening's grade: nothing loud, nothing missed by much.”
Umpire Grade
95.3% accurate
Run Favor
runs, SF
ABS Overturns
of 3 reviewed
What this shows — how Tripp Gibson called the 149 pitches that were taken (no swing), graded against the tracked rulebook strike zone. He got 142 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▼6 · 1-1 strike called ball
Nolan Arenado vs JT Brubaker - 2+0.13▲7 · 1-1 strike called ball
Eric Haase vs Eduardo Rodriguez - 3+0.10▲9 · 0-1 strike called ball
Drew Gilbert vs Paul Sewald
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 · 3 overturned (ump overruled) · 0 upheld (ump confirmed). This is Hawkeye ground truth, no model involved.
- 1Eric Haase — ump said strike, robot ruled ball: overturned.
- 2Nolan Arenado — ump said ball, robot ruled strike: overturned.
- 3Geraldo Perdomo — ump said ball, robot ruled strike: overturned.
Our tracked-rulebook zone matched the ABS ruling on 0 of 3 — a zone-definition gap (ABS grades a standardized, height-based zone), not our error.