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 Grade2026-05-26

NYY @ KC

Home plate: Nick Mahrley

“Solid and unspectacular — exactly what the job asks.”

B
Umpire Grade
92.5% accurate
0.2
Run Favor
runs, NYY
1
ABS Overturns
of 2 reviewed

What this shows — how Nick Mahrley called the 174 pitches that were taken (no swing), graded against the tracked rulebook strike zone. He got 161 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: Jazz Chisholm Jr. — the ump called it a strike, the robot ruled strike (upheld — ump confirmed).1Challenge 2: Salvador Perez — the ump called it a strike, the robot ruled ball (OVERTURNED — ump overruled).2
strike called ballball called strikeABS overturnedABS upheld

The calls that moved the game

  1. 1+0.28▲3 · 1-2 strike called ball
    Jazz Chisholm Jr. vs Bailey Falter
  2. 2+0.20▼2 · 2-1 strike called ball
    Nick Loftin vs Cam Schlittler
  3. 3+0.19▲3 · 2-0 strike called ball
    Aaron Judge vs Luinder Avila

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

2 pitches went to the robots · 1 overturned (ump overruled) · 1 upheld (ump confirmed). This is Hawkeye ground truth, no model involved.

  1. 1Jazz Chisholm Jr. — ump said strike, robot ruled strike: upheld.
  2. 2Salvador Perez — ump said strike, robot ruled ball: overturned.

Our tracked-rulebook zone matched the ABS ruling on 1 of 2 — a zone-definition gap (ABS grades a standardized, height-based zone), not our error.