Fever BaseballFuture Value Radar (FVR) · On the record
RECORD: 0 HIT · 0 MISS · 12 OPEN · FIRST CALL RESOLVES AUG 12
Support the paperGet the Digest
Blue Notes · Umpire Grade2026-05-04

BOS @ DET

Home plate: Dan Iassogna

“Nothing off the plate, and not much on the black either.”

C+
Umpire Grade
90.3% accurate
0.7
Run Favor
runs, DET
1
ABS Overturns
of 3 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 140 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: Wilyer Abreu — the ump called it a strike, the robot ruled strike (upheld — ump confirmed).1Challenge 2: Carlos Narváez — the ump called it a strike, the robot ruled ball (OVERTURNED — ump overruled).2Challenge 3: Wenceel Pérez — the ump called it a strike, the robot ruled strike (upheld — ump confirmed).3
strike called ballball called strikeABS overturnedABS upheld

The calls that moved the game

  1. 1+0.20▲7 · 2-1 strike called ball
    Masataka Yoshida vs Ricky Vanasco
  2. 2+0.20▼8 · 2-1 strike called ball
    Matt Vierling vs Garrett Whitlock
  3. 3+0.13▼6 · 1-0 strike called ball
    Jahmai Jones vs Payton Tolle

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

3 pitches went to the robots · 1 overturned (ump overruled) · 2 upheld (ump confirmed). This is Hawkeye ground truth, no model involved.

  1. 1Wilyer Abreu — ump said strike, robot ruled strike: upheld.
  2. 2Carlos Narváez — ump said strike, robot ruled ball: overturned.
  3. 3Wenceel Pérez — ump said strike, robot ruled strike: upheld.

Our tracked-rulebook zone matched the ABS ruling on 2 of 3 — a zone-definition gap (ABS grades a standardized, height-based zone), not our error.