Fever BaseballFor collectors and stat nerdsFuture Value Radar (FVR) · On the record
Blue Notes · Umpire Grade2026-09-11

NYM @ NYY

Home plate: Nick Mahrley

Borderline went to the battery all night.

B
Umpire Grade
92.7% accurate
0.5
Run Favor
runs, NYM
4
ABS Overturns
of 5 reviewed

What this shows — how Nick Mahrley called the 151 pitches that were taken (no swing), graded against the tracked rulebook strike zone. He got 140 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: Ben Rice — the ump called it a strike, the robot ruled ball (OVERTURNED — ump overruled).1Challenge 2: Francisco Alvarez — the ump called it a ball, the robot ruled strike (OVERTURNED — ump overruled).2Challenge 3: Mark Vientos — the ump called it a strike, the robot ruled ball (OVERTURNED — ump overruled).3Challenge 4: Austin Wells — the ump called it a ball, the robot ruled ball (upheld — ump confirmed).4Challenge 5: Austin Wells — the ump called it a ball, the robot ruled strike (OVERTURNED — ump overruled).5
strike called ballball called strikeABS overturnedABS upheld

The calls that moved the game

  1. 1-0.302 · 3-1 ball called strike
    Cody Bellinger vs Nolan McLean
  2. 2+0.137 · 1-1 strike called ball
    Carson Benge vs Carlos Rodón
  3. 3-0.107 · 0-1 ball called strike
    Aaron Judge vs Jack Weisenburger

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

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

  1. 1Ben Rice — ump said strike, robot ruled ball: overturned.
  2. 2Francisco Alvarez — ump said ball, robot ruled strike: overturned.
  3. 3Mark Vientos — ump said strike, robot ruled ball: overturned.
  4. 4Austin Wells — ump said ball, robot ruled ball: upheld.
  5. 5Austin Wells — ump said ball, robot ruled strike: overturned.

Our tracked-rulebook zone matched the ABS ruling on 3 of 5 — a zone-definition gap (ABS grades a standardized, height-based zone), not our error.

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