Blue Notes · Umpire Grade2026-04-13
MIA @ ATL
Home plate: Dan Iassogna
“The zone kept its promises.”
Umpire Grade
93.3% accurate
Run Favor
runs, MIA
ABS Overturns
of 5 reviewed
What this shows — how Dan Iassogna called the 179 pitches that were taken (no swing), graded against the tracked rulebook strike zone. He got 167 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
- 1-0.39▼9 · 2-2 ball called strike
Drake Baldwin vs Anthony Bender - 2+0.30▲4 · 3-1 strike called ball· challenged ✓
Heriberto Hernández vs Grant Holmes - 3+0.13▲4 · 1-0 strike called ball
Heriberto Hernández vs Grant Holmes
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 · 3 overturned (ump overruled) · 2 upheld (ump confirmed). This is the ABS system’s own measurement — Hawk-Eye optical ball-tracking, not our model.
- 1Drake Baldwin — ump said ball, robot ruled strike: overturned.
- 2Liam Hicks — ump said ball, robot ruled strike: overturned.
- 3Graham Pauley — ump said strike, robot ruled strike: upheld.
- 4Liam Hicks — ump said strike, robot ruled ball: overturned.
- 5Liam Hicks — ump said ball, robot ruled ball: 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.