Fever BaseballFor collectors and stat nerdsFuture Value Radar (FVR) · On the record
Blue Notes · Umpire Grade2026-09-05

AZ @ HOU

Home plate: Laz Diaz

“Nothing off the plate, and not much on the black either.”

C
Umpire Grade
89.1% accurate
0.7
Run Favor
runs, HOU
3
ABS Overturns
of 5 reviewed

What this shows — how Laz Diaz called the 165 pitches that were taken (no swing), graded against the tracked rulebook strike zone, or, on a pitch the ABS (Automated Ball-Strike System) reviewed on a challenge, against its ruling. 147 were right. Below, only the misses are plotted, alongside every challenged pitch.

The zone, as he called it

Challenge 1: Corbin Carroll — the ump called it a strike, the robot ruled ball (OVERTURNED — ump overruled).1Challenge 2: Gabriel Moreno — the ump called it a ball, the robot ruled ball (upheld — ump confirmed).2Challenge 3: Yainer Diaz — the ump called it a ball, the robot ruled strike (OVERTURNED — ump overruled).3Challenge 4: Gabriel Moreno — the ump called it a strike, the robot ruled ball (OVERTURNED — ump overruled).4Challenge 5: Jose Altuve — the ump called it a strike, the robot ruled strike (upheld — ump confirmed).5
strike called ballball called strikeABS overturnedABS upheld

The calls that moved the game

  1. 1-0.30▲1 · 3-1 ball called strike
    Lars Nootbaar vs Ethan Pecko
  2. 2-0.23▲7 · 0-2 ball called strike· challenged ✓
    Gabriel Moreno vs AJ Blubaugh
  3. 3-0.20▲2 · 2-1 ball called strike· challenged ✓
    Corbin Carroll vs Ethan Pecko

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 · 3 overturned (ump overruled) · 2 upheld (ump confirmed). This is the ABS system’s own measurement — Hawk-Eye optical ball-tracking, not our model.

  1. 1Corbin Carroll — ump said strike, robot ruled ball: overturned.
  2. 2Gabriel Moreno — ump said ball, robot ruled ball: upheld.
  3. 3Yainer Diaz — ump said ball, robot ruled strike: overturned.
  4. 4Gabriel Moreno — ump said strike, robot ruled ball: overturned.
  5. 5Jose Altuve — ump said strike, robot ruled strike: upheld.

Our tracked-rulebook zone matched the ABS ruling on 5 of 5 — a zone-definition gap (ABS grades a standardized, height-based zone). Where the two disagree, the umpire is graded on the ABS ruling.

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