Blue Notes · Umpire Grade2026-09-08
HOU @ PHI
Home plate: Dan Iassogna
“The zone kept its promises.”
Umpire Grade
95.4% accurate
Run Favor
runs, HOU
ABS Overturns
of 5 reviewed
What this shows — how Dan Iassogna called the 153 pitches that were taken (no swing), graded against the tracked rulebook strike zone. He got 146 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+0.23▲1 · 0-2 strike called ball
Jose Altuve vs Andrew Painter - 2+0.20▲8 · 2-1 strike called ball
Yordan Alvarez vs Chase Shugart - 3-0.19▲9 · 2-0 ball called strike
Isaac Paredes vs José Alvarado
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
5 pitches went to the robots · 1 overturned (ump overruled) · 4 upheld (ump confirmed). This is the ABS system’s own measurement — Hawk-Eye optical ball-tracking, not our model.
- 1Taylor Trammell — ump said strike, robot ruled strike: upheld.
- 2J.T. Realmuto — ump said ball, robot ruled strike: overturned.
- 3Cam Smith — ump said strike, robot ruled strike: upheld.
- 4Kyle Schwarber — ump said strike, robot ruled strike: upheld.
- 5Alec Bohm — ump said strike, robot ruled strike: upheld.
Our tracked-rulebook zone matched the ABS ruling on 5 of 5 — a zone-definition gap (ABS grades a standardized, height-based zone), not our error.