Fever BaseballFor collectors and stat nerdsFuture Value Radar (FVR) · On the record
Blue Notes · Umpire Grade2026-06-04

The corners were friendlier in one direction tonight.

A
Umpire Grade
96.4% accurate
1.0
Run Favor
runs, ATH
2
ABS Overturns
of 3 reviewed

What this shows — how Steven Jaschinski called the 137 pitches that were taken (no swing), graded against the tracked rulebook strike zone. He got 132 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: Moisés Ballesteros — the ump called it a ball, the robot ruled strike (OVERTURNED — ump overruled).1Challenge 2: Nico Hoerner — the ump called it a strike, the robot ruled ball (OVERTURNED — ump overruled).2Challenge 3: Jonah Heim — the ump called it a ball, the robot ruled ball (upheld — ump confirmed).3
strike called ballball called strikeABS overturnedABS upheld

The calls that moved the game

  1. 1+0.697 · 3-2 strike called ball
    Zack Gelof vs Trent Thornton
  2. 2+0.394 · 2-2 strike called ball· challenged
    Henry Bolte vs Shota Imanaga
  3. 3-0.135 · 1-1 ball called strike· challenged
    Nico Hoerner vs J.T. Ginn

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

  1. 1Moisés Ballesteros — ump said ball, robot ruled strike: overturned.
  2. 2Nico Hoerner — ump said strike, robot ruled ball: overturned.
  3. 3Jonah Heim — ump said ball, robot ruled ball: upheld.

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

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