Blue Notes · Umpire Grade2026-07-01
SD @ CHC
Home plate: Dan Iassogna
“A workmanlike night — nothing to frame, nothing to fix.”
Umpire Grade
96.8% accurate
Run Favor
runs, CHC
ABS Overturns
of 1 reviewed
What this shows — how Dan Iassogna called the 155 pitches that were taken (no swing), graded against the tracked rulebook strike zone. He got 150 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+0.30▼1 · 3-1 strike called ball
Nico Hoerner vs Walker Buehler - 2-0.19▼3 · 2-0 ball called strike
Seiya Suzuki vs Walker Buehler - 3+0.13▼6 · 1-0 strike called ball
Seiya Suzuki vs Kyle Hart
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
1 pitch went to the robots · 0 overturned (ump overruled) · 1 upheld (ump confirmed). This is Hawkeye ground truth, no model involved.
- 1Rodolfo Durán — ump said ball, robot ruled ball: upheld.
Our tracked-rulebook zone matched the ABS ruling on 1 of 1 — a zone-definition gap (ABS grades a standardized, height-based zone), not our error.