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

CLE @ KC

Home plate: John Bacon

Nothing that'll trend, and on this beat that's a compliment.

B+
Umpire Grade
93.2% accurate
0.9
Run Favor
runs, KC
4
ABS Overturns
of 5 reviewed

What this shows — how John Bacon called the 132 pitches that were taken (no swing), graded against the tracked rulebook strike zone. He got 123 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: Carter Jensen — the ump called it a ball, the robot ruled strike (OVERTURNED — ump overruled).1Challenge 2: Steven Kwan — the ump called it a strike, the robot ruled ball (OVERTURNED — ump overruled).2Challenge 3: Bo Naylor — the ump called it a ball, the robot ruled ball (upheld — ump confirmed).3Challenge 4: Carter Jensen — the ump called it a ball, the robot ruled strike (OVERTURNED — ump overruled).4Challenge 5: David Fry — 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. 1-0.395 · 2-2 ball called strike
    Bo Naylor vs Stephen Kolek
  2. 2-0.218 · 3-0 ball called strike· challenged
    David Fry vs Daniel Lynch IV
  3. 3-0.203 · 2-1 ball called strike· challenged
    Steven Kwan vs Stephen Kolek

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

  1. 1Carter Jensen — ump said ball, robot ruled strike: overturned.
  2. 2Steven Kwan — ump said strike, robot ruled ball: overturned.
  3. 3Bo Naylor — ump said ball, robot ruled ball: upheld.
  4. 4Carter Jensen — ump said ball, robot ruled strike: overturned.
  5. 5David Fry — ump said strike, robot ruled ball: overturned.

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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