Fever BaseballFor collectors and stat nerdsFuture Value Radar (FVR) · On the record
Blue Notes · Umpire Grade2026-04-26

LAA @ KC

Home plate: Alex MacKay

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

A
Umpire Grade
95.8% accurate
0.6
Run Favor
runs, LAA
1
ABS Overturns
of 4 reviewed

What this shows — how Alex MacKay called the 189 pitches that were taken (no swing), graded against the tracked rulebook strike zone. He got 181 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: Vinnie Pasquantino — the ump called it a strike, the robot ruled ball (OVERTURNED — ump overruled).1Challenge 2: Travis d'Arnaud — the ump called it a ball, the robot ruled ball (upheld — ump confirmed).2Challenge 3: Carter Jensen — the ump called it a ball, the robot ruled ball (upheld — ump confirmed).3Challenge 4: Bryce Teodosio — the ump called it a strike, the robot ruled strike (upheld — ump confirmed).4
strike called ballball called strikeABS overturnedABS upheld

The calls that moved the game

  1. 1-0.306 · 3-1 ball called strike· challenged
    Vinnie Pasquantino vs Reid Detmers
  2. 2+0.235 · 0-2 strike called ball
    Carter Jensen vs Reid Detmers
  3. 3-0.138 · 1-1 ball called strike
    Jac Caglianone vs Ryan Zeferjahn

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

4 pitches went to the robots · 1 overturned (ump overruled) · 3 upheld (ump confirmed). This is the ABS system’s own measurement — Hawk-Eye optical ball-tracking, not our model.

  1. 1Vinnie Pasquantino — ump said strike, robot ruled ball: overturned.
  2. 2Travis d'Arnaud — ump said ball, robot ruled ball: upheld.
  3. 3Carter Jensen — ump said ball, robot ruled ball: upheld.
  4. 4Bryce Teodosio — ump said strike, robot ruled strike: upheld.

Our tracked-rulebook zone matched the ABS ruling on 3 of 4 — a zone-definition gap (ABS grades a standardized, height-based zone), not our error.

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