Fever BaseballFor collectors and stat nerdsFuture Value Radar (FVR) · On the record
Blue Notes · Umpire Grade2026-05-10

WSH @ MIA

Home plate: Chris Guccione

The zone had wings tonight.

B-
Umpire Grade
91.7% accurate
0.9
Run Favor
runs, MIA
2
ABS Overturns
of 5 reviewed

What this shows — how Chris Guccione called the 144 pitches that were taken (no swing), graded against the tracked rulebook strike zone. He got 132 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: Joe Mack — the ump called it a ball, the robot ruled ball (upheld — ump confirmed).1Challenge 2: Drew Millas — the ump called it a ball, the robot ruled strike (OVERTURNED — ump overruled).2Challenge 3: Drew Millas — the ump called it a ball, the robot ruled ball (upheld — ump confirmed).3Challenge 4: Drew Millas — the ump called it a ball, the robot ruled ball (upheld — ump confirmed).4Challenge 5: Heriberto Hernández — the ump called it a strike, the robot ruled ball (OVERTURNED — ump overruled).5
strike called ballball called strikeABS overturnedABS upheld

The calls that moved the game

  1. 1+0.398 · 2-2 strike called ball
    Heriberto Hernández vs Gus Varland
  2. 2-0.399 · 2-2 ball called strike
    CJ Abrams vs Andrew Nardi
  3. 3+0.306 · 3-1 strike called ball· challenged
    Jakob Marsee vs Cade Cavalli

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

  1. 1Joe Mack — ump said ball, robot ruled ball: upheld.
  2. 2Drew Millas — ump said ball, robot ruled strike: overturned.
  3. 3Drew Millas — ump said ball, robot ruled ball: upheld.
  4. 4Drew Millas — ump said ball, robot ruled ball: upheld.
  5. 5Heriberto Hernández — ump said strike, robot ruled ball: overturned.

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

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