Fever BaseballFor collectors and stat nerdsFuture Value Radar (FVR) · On the record
Blue Notes · Umpire Grade2026-09-01

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

A-
Umpire Grade
94.8% accurate
0.1
Run Favor
runs, ATH
5
ABS Overturns
of 6 reviewed

What this shows — how Hunter Wendelstedt called the 173 pitches that were taken (no swing), graded against the tracked rulebook strike zone. He got 164 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: Elias Díaz — the ump called it a ball, the robot ruled strike (OVERTURNED — ump overruled).1Challenge 2: Jonah Heim — the ump called it a ball, the robot ruled ball (upheld — ump confirmed).2Challenge 3: Ezequiel Duran — the ump called it a strike, the robot ruled ball (OVERTURNED — ump overruled).3Challenge 4: Zack Gelof — the ump called it a strike, the robot ruled ball (OVERTURNED — ump overruled).4Challenge 5: Logan O'Hoppe — the ump called it a strike, the robot ruled ball (OVERTURNED — ump overruled).5Challenge 6: Jonah Heim — the ump called it a ball, the robot ruled strike (OVERTURNED — ump overruled).6
strike called ballball called strikeABS overturnedABS upheld

The calls that moved the game

  1. 1+0.391 · 2-2 strike called ball
    Henry Bolte vs MacKenzie Gore
  2. 2-0.307 · 3-1 ball called strike· challenged
    Zack Gelof vs Adam Macko
  3. 3+0.286 · 1-2 strike called ball
    Michael Stefanic vs MacKenzie Gore

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

6 pitches went to the robots · 5 overturned (ump overruled) · 1 upheld (ump confirmed). This is the ABS system’s own measurement — Hawk-Eye optical ball-tracking, not our model.

  1. 1Elias Díaz — ump said ball, robot ruled strike: overturned.
  2. 2Jonah Heim — ump said ball, robot ruled ball: upheld.
  3. 3Ezequiel Duran — ump said strike, robot ruled ball: overturned.
  4. 4Zack Gelof — ump said strike, robot ruled ball: overturned.
  5. 5Logan O'Hoppe — ump said strike, robot ruled ball: overturned.
  6. 6Jonah Heim — ump said ball, robot ruled strike: overturned.

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

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