Fever BaseballFor collectors and stat nerdsFuture Value Radar (FVR) · On the record
Blue Notes · Umpire Grade2026-05-18

SF @ AZ

Home plate: Chad Whitson

A workmanlike night — nothing to frame, nothing to fix.

A
Umpire Grade
95.1% accurate
0.2
Run Favor
runs, SF
1
ABS Overturns
of 1 reviewed

What this shows — how Chad Whitson called the 142 pitches that were taken (no swing), graded against the tracked rulebook strike zone. He got 135 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: Gabriel Moreno — the ump called it a ball, the robot ruled strike (OVERTURNED — ump overruled).1
strike called ballball called strikeABS overturnedABS upheld

The calls that moved the game

  1. 1+0.207 · 2-1 strike called ball
    Matt Chapman vs Ryan Thompson
  2. 2-0.135 · 1-0 ball called strike
    Will Brennan vs Zac Gallen
  3. 3-0.135 · 1-0 ball called strike
    Corbin Carroll vs JT Brubaker

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. 1Gabriel Moreno — ump said ball, robot ruled strike: overturned.

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

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