Fever BaseballFor collectors and stat nerdsFuture Value Radar (FVR) · On the record
Blue Notes · Umpire Grade2026-04-15

AZ @ BAL

Home plate: John Tumpane

The strike zone picked a side, and wasn't shy about it.

A-
Umpire Grade
94.2% accurate
1.0
Run Favor
runs, AZ
2
ABS Overturns
of 4 reviewed

What this shows — how John Tumpane called the 155 pitches that were taken (no swing), graded against the tracked rulebook strike zone. He got 146 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: Coby Mayo — the ump called it a strike, the robot ruled strike (upheld — ump confirmed).1Challenge 2: Johnathan Rodríguez — the ump called it a strike, the robot ruled ball (OVERTURNED — ump overruled).2Challenge 3: Ketel Marte — the ump called it a strike, the robot ruled strike (upheld — ump confirmed).3Challenge 4: Sam Huff — the ump called it a ball, the robot ruled strike (OVERTURNED — ump overruled).4
strike called ballball called strikeABS overturnedABS upheld

The calls that moved the game

  1. 1+0.399 · 2-2 strike called ball· challenged
    Corbin Carroll vs Ryan Helsley
  2. 2-0.302 · 3-1 ball called strike
    Blaze Alexander vs Eduardo Rodriguez
  3. 3-0.283 · 1-2 ball called strike
    Weston Wilson vs Eduardo Rodriguez

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

  1. 1Coby Mayo — ump said strike, robot ruled strike: upheld.
  2. 2Johnathan Rodríguez — ump said strike, robot ruled ball: overturned.
  3. 3Ketel Marte — ump said strike, robot ruled strike: upheld.
  4. 4Sam Huff — ump said ball, robot ruled strike: overturned.

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

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