Fever BaseballFor collectors and stat nerdsFuture Value Radar (FVR) · On the record
Blue Notes · Umpire Grade2026-04-01

DET @ AZ

Home plate: Adam Hamari

A clean sheet behind the plate — the kind of night nobody posts about.

A
Umpire Grade
95.8% accurate
0.2
Run Favor
runs, DET
1
ABS Overturns
of 1 reviewed

What this shows — how Adam Hamari called the 118 pitches that were taken (no swing), graded against the tracked rulebook strike zone. He got 113 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: Matt Vierling — the ump called it a strike, the robot ruled ball (OVERTURNED — ump overruled).1
strike called ballball called strikeABS overturnedABS upheld

The calls that moved the game

  1. 1+0.198 · 2-0 strike called ball
    Ketel Marte vs Kyle Finnegan
  2. 2+0.104 · 0-1 strike called ball
    Dillon Dingler vs Zac Gallen
  3. 3+0.091 · 0-0 strike called ball
    Colt Keith vs Zac Gallen

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

1 pitch went to the robots · 1 overturned (ump overruled) · 0 upheld (ump confirmed). This is the ABS system’s own measurement — Hawk-Eye optical ball-tracking, not our model.

  1. 1Matt Vierling — ump said strike, robot ruled ball: overturned.

Our tracked-rulebook zone matched the ABS ruling on 0 of 1 — a zone-definition gap (ABS grades a standardized, height-based zone), not our error.

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