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

KC @ DET

Home plate: Jansen Visconti

A steady night's work behind the plate.

B+
Umpire Grade
94.0% accurate
0.2
Run Favor
runs, KC
1
ABS Overturns
of 4 reviewed

What this shows — how Jansen Visconti called the 149 pitches that were taken (no swing), graded against the tracked rulebook strike zone. He got 140 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: Salvador Perez — the ump called it a ball, the robot ruled strike (OVERTURNED — ump overruled).1Challenge 2: Kevin McGonigle — the ump called it a strike, the robot ruled strike (upheld — ump confirmed).2Challenge 3: Jake Rogers — the ump called it a strike, the robot ruled strike (upheld — ump confirmed).3Challenge 4: Jac Caglianone — the ump called it a strike, the robot ruled strike (upheld — ump confirmed).4
strike called ballball called strikeABS overturnedABS upheld

The calls that moved the game

  1. 1-0.396 · 2-2 ball called strike· challenged
    Kevin McGonigle vs Seth Lugo
  2. 2+0.301 · 3-1 strike called ball· challenged
    Colt Keith vs Seth Lugo
  3. 3+0.237 · 0-2 strike called ball
    Jonathan India vs Tyler Holton

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

  1. 1Salvador Perez — ump said ball, robot ruled strike: overturned.
  2. 2Kevin McGonigle — ump said strike, robot ruled strike: upheld.
  3. 3Jake Rogers — ump said strike, robot ruled strike: upheld.
  4. 4Jac Caglianone — ump said strike, robot ruled strike: upheld.

Our tracked-rulebook zone matched the ABS ruling on 3 of 4 — a zone-definition gap (ABS grades a standardized, height-based zone), not our error.

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