Blue Notes · Umpire Grade2026-04-04
BAL @ PIT
Home plate: Dan Iassogna
“No notes. Well, one: nicely done.”
Umpire Grade
96.4% accurate
Run Favor
runs, PIT
ABS Overturns
of 2 reviewed
What this shows — how Dan Iassogna called the 194 pitches that were taken (no swing), graded against the tracked rulebook strike zone. He got 187 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 strike called ball
Nick Yorke vs Ryan Helsley - 2-0.30▲8 · 3-1 ball called strike
Leody Taveras vs Isaac Mattson - 3-0.13▼3 · 1-1 ball called strike
Oneil Cruz vs Shane Baz
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 Hawkeye ground truth, no model involved.
- 1Coby Mayo — ump said strike, robot ruled strike: upheld.
- 2Gunnar Henderson — ump said strike, robot ruled strike: 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.