Blue Notes · Umpire Grade2026-09-16
ATH @ TB
Home plate: Alan Porter
“The zone had wings tonight.”
Umpire Grade
92.4% accurate
Run Favor
runs, TB
ABS Overturns
of 2 reviewed
What this shows — how Alan Porter called the 92 pitches that were taken (no swing), graded against the tracked rulebook strike zone. He got 85 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▲5 · 1-1 strike called ball
Carlos Cortes vs Nick Martinez - 2-0.13▲5 · 1-1 ball called strike
Brian Serven vs Nick Martinez - 3-0.10▲9 · 0-1 ball called strike
Donovan Walton vs Cole Sulser
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
2 pitches went to the robots · 0 overturned (ump overruled) · 2 upheld (ump confirmed). This is the ABS system’s own measurement — Hawk-Eye optical ball-tracking, not our model.
- 1Lawrence Butler — ump said strike, robot ruled strike: upheld.
- 2Liam Hicks — ump said ball, robot ruled ball: upheld.
Our tracked-rulebook zone matched the ABS ruling on 2 of 2 — a zone-definition gap (ABS grades a standardized, height-based zone), not our error.