Fever BaseballFuture Value Radar (FVR) · On the record
RECORD: 0 HIT · 0 MISS · 12 OPEN · FIRST CALL RESOLVES AUG 12
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Blue Notes · Umpire Grade2026-05-17

AZ @ COL

Home plate: Nick Mahrley

“Called a fair game and let the players decide it.”

A-
Umpire Grade
94.5% accurate
0.2
Run Favor
runs, COL
2
ABS Overturns
of 3 reviewed

What this shows — how Nick Mahrley called the 165 pitches that were taken (no swing), graded against the tracked rulebook strike zone. He got 156 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 strike, the robot ruled ball (OVERTURNED — ump overruled).1Challenge 2: Jose Fernandez — the ump called it a strike, the robot ruled strike (upheld — ump confirmed).2Challenge 3: TJ Rumfield — the ump called it a ball, the robot ruled strike (OVERTURNED — ump overruled).3
strike called ballball called strikeABS overturnedABS upheld

The calls that moved the game

  1. 1-0.39▲7 · 2-2 ball called strike
    Jose Fernandez vs Blas Castaño
  2. 2-0.21▼8 · 3-0 ball called strike
    Troy Johnston vs Brandon Pfaadt
  3. 3+0.20▲3 · 2-1 strike called ball
    Corbin Carroll vs Michael Lorenzen

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 Hawkeye ground truth, no model involved.

  1. 1Gabriel Moreno — ump said strike, robot ruled ball: overturned.
  2. 2Jose Fernandez — ump said strike, robot ruled strike: upheld.
  3. 3TJ Rumfield — ump said ball, robot ruled strike: overturned.

Our tracked-rulebook zone matched the ABS ruling on 1 of 3 — a zone-definition gap (ABS grades a standardized, height-based zone), not our error.