Blue Notes · Umpire Grade2026-04-08
KC @ CLE
Home plate: Dan Iassogna
“The corners were friendlier in one direction tonight.”
Umpire Grade
91.7% accurate
Run Favor
runs, KC
ABS Overturns
of 4 reviewed
What this shows — how Dan Iassogna called the 180 pitches that were taken (no swing), graded against the tracked rulebook strike zone. He got 165 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
- 1-0.69▼2 · 3-2 ball called strike
Austin Hedges vs Luinder Avila - 2-0.39▼8 · 2-2 ball called strike
José Ramírez vs Steven Cruz - 3-0.30▼8 · 3-1 ball called strike
Brayan Rocchio vs Steven Cruz
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
4 pitches went to the robots · 3 overturned (ump overruled) · 1 upheld (ump confirmed). This is Hawkeye ground truth, no model involved.
- 1Angel Martínez — ump said ball, robot ruled strike: overturned.
- 2Austin Hedges — ump said strike, robot ruled ball: overturned.
- 3Kyle Manzardo — ump said ball, robot ruled strike: overturned.
- 4Carter Jensen — ump said ball, robot ruled ball: upheld.
Our tracked-rulebook zone matched the ABS ruling on 1 of 4 — a zone-definition gap (ABS grades a standardized, height-based zone), not our error.