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 Grade2026-06-05

ATH @ HOU

Home plate: Nick Mahrley

“The grade leaned — the ledger says which way.”

C+
Umpire Grade
90.5% accurate
1.7
Run Favor
runs, HOU
2
ABS Overturns
of 4 reviewed

What this shows — how Nick Mahrley called the 148 pitches that were taken (no swing), graded against the tracked rulebook strike zone. He got 134 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: Christian Vázquez — the ump called it a strike, the robot ruled ball (OVERTURNED — ump overruled).1Challenge 2: Shea Langeliers — the ump called it a ball, the robot ruled ball (upheld — ump confirmed).2Challenge 3: Christian Vázquez — the ump called it a ball, the robot ruled strike (OVERTURNED — ump overruled).3Challenge 4: Christian Vázquez — the ump called it a ball, the robot ruled ball (upheld — ump confirmed).4
strike called ballball called strikeABS overturnedABS upheld

The calls that moved the game

  1. 1+0.69▼5 · 3-2 strike called ball· challenged
    Jeremy Peña vs Jack Perkins
  2. 2+0.39▼7 · 2-2 strike called ball· challenged ✓
    Christian Vázquez vs Mason Barnett
  3. 3+0.28▼4 · 1-2 strike called ball
    Nick Allen vs Jack Perkins

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 · 2 overturned (ump overruled) · 2 upheld (ump confirmed). This is Hawkeye ground truth, no model involved.

  1. 1Christian Vázquez — ump said strike, robot ruled ball: overturned.
  2. 2Shea Langeliers — ump said ball, robot ruled ball: upheld.
  3. 3Christian Vázquez — ump said ball, robot ruled strike: overturned.
  4. 4Christian Vázquez — ump said ball, robot ruled ball: upheld.

Our tracked-rulebook zone matched the ABS ruling on 2 of 4 — a zone-definition gap (ABS grades a standardized, height-based zone), not our error.