Fever BaseballFor collectors and stat nerdsFuture Value Radar (FVR) · On the record
Blue Notes · Umpire Grade2026-07-24

KC @ DET

Home plate: Laz Diaz

Pitchers found a little extra real estate.

C
Umpire Grade
89.9% accurate
0.4
Run Favor
runs, DET
2
ABS Overturns
of 3 reviewed

What this shows — how Laz Diaz called the 109 pitches that were taken (no swing), graded against the tracked rulebook strike zone. He got 98 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: Salvador Perez — the ump called it a strike, the robot ruled ball (OVERTURNED — ump overruled).1Challenge 2: Isaac Collins — the ump called it a strike, the robot ruled strike (upheld — ump confirmed).2Challenge 3: Gleyber Torres — 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. 1-0.234 · 0-2 ball called strike· challenged
    Isaac Collins vs Tarik Skubal
  2. 2-0.208 · 2-1 ball called strike
    Gleyber Torres vs Noah Cameron
  3. 3-0.197 · 2-0 ball called strike
    Nick Loftin vs Tarik Skubal

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 the ABS system’s own measurement — Hawk-Eye optical ball-tracking, not our model.

  1. 1Salvador Perez — ump said strike, robot ruled ball: overturned.
  2. 2Isaac Collins — ump said strike, robot ruled strike: upheld.
  3. 3Gleyber Torres — ump said ball, robot ruled strike: overturned.

Our tracked-rulebook zone matched the ABS ruling on 0 of 3 — a zone-definition gap (ABS grades a standardized, height-based zone), not our error.

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