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

DET @ CLE

Home plate: Ron Kulpa

“Called a fair game and let the players decide it.”

B+
Umpire Grade
93.8% accurate
0.5
Run Favor
runs, DET
0
ABS Overturns
of 2 reviewed

What this shows — how Ron Kulpa called the 145 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. 136 were right. Below, only the misses are plotted, alongside every challenged pitch.

The zone, as he called it

Challenge 1: Dillon Dingler — the ump called it a strike, the robot ruled strike (upheld — ump confirmed).1Challenge 2: Hao-Yu Lee — the ump called it a strike, the robot ruled strike (upheld — ump confirmed).2
strike called ballball called strikeABS overturnedABS upheld

The calls that moved the game

  1. 1+0.30▲3 · 3-1 strike called ball
    Hao-Yu Lee vs Parker Messick
  2. 2+0.13▲7 · 1-0 strike called ball
    Hao-Yu Lee vs Matt Festa
  3. 3+0.10▼3 · 0-1 strike called ball
    Steven Kwan vs Framber Valdez

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

2 pitches went to the robots · 0 overturned (ump overruled) · 2 upheld (ump confirmed). This is the ABS system’s own measurement — Hawk-Eye optical ball-tracking, not our model.

  1. 1Dillon Dingler — ump said strike, robot ruled strike: upheld.
  2. 2Hao-Yu Lee — ump said strike, robot ruled strike: upheld.

Our tracked-rulebook zone matched the ABS ruling on 2 of 2 — 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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