Fever BaseballFor collectors and stat nerdsFuture Value Radar (FVR) · On the record
Blue Notes · Umpire Grade2026-05-30

AZ @ SEA

Home plate: David Rackley

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

A
Umpire Grade
96.5% accurate
0.4
Run Favor
runs, SEA
2
ABS Overturns
of 3 reviewed

What this shows — how David Rackley called the 113 pitches that were taken (no swing), graded against the tracked rulebook strike zone. He got 109 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).1Challenge 2: Corbin Carroll — the ump called it a strike, the robot ruled strike (upheld — ump confirmed).2Challenge 3: Gabriel Moreno — the ump called it a strike, the robot ruled ball (OVERTURNED — ump overruled).3
strike called ballball called strikeABS overturnedABS upheld

The calls that moved the game

  1. 1-0.136 · 1-0 ball called strike· challenged
    Corbin Carroll vs Bryan Woo
  2. 2-0.107 · 0-1 ball called strike· challenged
    Gabriel Moreno vs Bryan Woo
  3. 3+0.092 · 0-0 strike called ball· challenged
    Mitch Garver vs Ryne Nelson

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. 1Gabriel Moreno — ump said ball, robot ruled strike: overturned.
  2. 2Corbin Carroll — ump said strike, robot ruled strike: upheld.
  3. 3Gabriel Moreno — ump said strike, robot ruled ball: overturned.

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.

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