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Blue Notes · Umpire Grade2026-03-31

TB @ MIL

Home plate: Dan Iassogna

“The Automated Ball-Strike System put in some overtime here.”

C+
Umpire Grade
90.8% accurate
0.7
Run Favor
runs, TB
5
ABS Overturns
of 7 reviewed

What this shows — how Dan Iassogna called the 152 pitches that were taken (no swing), graded against the tracked rulebook strike zone. He got 138 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

Challenge 1: William Contreras — the ump called it a ball, the robot ruled strike (OVERTURNED — ump overruled).1Challenge 2: Chandler Simpson — the ump called it a strike, the robot ruled strike (upheld — ump confirmed).2Challenge 3: Jake Fraley — the ump called it a strike, the robot ruled ball (OVERTURNED — ump overruled).3Challenge 4: Nick Fortes — the ump called it a ball, the robot ruled strike (OVERTURNED — ump overruled).4Challenge 5: Jake Fraley — the ump called it a strike, the robot ruled ball (OVERTURNED — ump overruled).5Challenge 6: Garrett Mitchell — the ump called it a strike, the robot ruled strike (upheld — ump confirmed).6Challenge 7: William Contreras — the ump called it a ball, the robot ruled strike (OVERTURNED — ump overruled).7
strike called ballball called strikeABS overturnedABS upheld

The calls that moved the game

  1. 1+0.69▲1 · 3-2 strike called ball· challenged ✓
    Junior Caminero vs Brandon Woodruff
  2. 2-0.30▼5 · 3-1 ball called strike
    Gary Sánchez vs Shane McClanahan
  3. 3+0.20▼7 · 2-1 strike called ball
    Brice Turang vs Yoendrys Gómez

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

7 pitches went to the robots · 5 overturned (ump overruled) · 2 upheld (ump confirmed). This is the ABS system’s own measurement — Hawk-Eye optical ball-tracking, not our model.

  1. 1William Contreras — ump said ball, robot ruled strike: overturned.
  2. 2Chandler Simpson — ump said strike, robot ruled strike: upheld.
  3. 3Jake Fraley — ump said strike, robot ruled ball: overturned.
  4. 4Nick Fortes — ump said ball, robot ruled strike: overturned.
  5. 5Jake Fraley — ump said strike, robot ruled ball: overturned.
  6. 6Garrett Mitchell — ump said strike, robot ruled strike: upheld.
  7. 7William Contreras — ump said ball, robot ruled strike: overturned.

Our tracked-rulebook zone matched the ABS ruling on 6 of 7 — a zone-definition gap (ABS grades a standardized, height-based zone), not our error.

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