Fever BaseballFor collectors and stat nerdsFuture Value Radar (FVR) · On the record
Blue Notes · Umpire Grade2026-05-03

KC @ SEA

Home plate: Clint Vondrak

A pitcher's-nightmare zone — you had to paint it to get it.

C+
Umpire Grade
90.0% accurate
0.3
Run Favor
runs, SEA
3
ABS Overturns
of 5 reviewed

What this shows — how Clint Vondrak called the 140 pitches that were taken (no swing), graded against the tracked rulebook strike zone. He got 126 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: Maikel Garcia — the ump called it a strike, the robot ruled ball (OVERTURNED — ump overruled).1Challenge 2: Jhonny Pereda — the ump called it a ball, the robot ruled ball (upheld — ump confirmed).2Challenge 3: Carter Jensen — the ump called it a ball, the robot ruled strike (OVERTURNED — ump overruled).3Challenge 4: Carter Jensen — the ump called it a ball, the robot ruled strike (OVERTURNED — ump overruled).4Challenge 5: Josh Naylor — 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+0.692 · 3-2 strike called ball
    Connor Joe vs Kris Bubic
  2. 2-0.693 · 3-2 ball called strike
    Rob Refsnyder vs Kris Bubic
  3. 3+0.203 · 2-1 strike called ball
    Maikel Garcia vs Luis Castillo

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. 1Maikel Garcia — ump said strike, robot ruled ball: overturned.
  2. 2Jhonny Pereda — ump said ball, robot ruled ball: upheld.
  3. 3Carter Jensen — ump said ball, robot ruled strike: overturned.
  4. 4Carter Jensen — ump said ball, robot ruled strike: overturned.
  5. 5Josh Naylor — ump said strike, robot ruled strike: upheld.

Our tracked-rulebook zone matched the ABS ruling on 4 of 5 — a zone-definition gap (ABS grades a standardized, height-based zone), not our error.

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