Fever BaseballFor collectors and stat nerdsFuture Value Radar (FVR) · On the record
Blue Notes · Umpire Grade2026-07-22

MIA @ HOU

Home plate: John Libka

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

A
Umpire Grade
95.3% accurate
0.6
Run Favor
runs, HOU
2
ABS Overturns
of 5 reviewed

What this shows — how John Libka called the 129 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: Kyle Stowers — the ump called it a strike, the robot ruled strike (upheld — ump confirmed).1Challenge 2: Christian Vázquez — the ump called it a strike, the robot ruled ball (OVERTURNED — ump overruled).2Challenge 3: Yainer Diaz — the ump called it a ball, the robot ruled strike (OVERTURNED — ump overruled).3Challenge 4: Christian Vázquez — the ump called it a ball, the robot ruled ball (upheld — ump confirmed).4Challenge 5: Joe Mack — the ump called it a ball, the robot ruled ball (upheld — ump confirmed).5
strike called ballball called strikeABS overturnedABS upheld

The calls that moved the game

  1. 1+0.398 · 2-2 strike called ball
    Christian Walker vs Calvin Faucher
  2. 2+0.304 · 3-1 strike called ball
    Griffin Conine vs Peter Lambert
  3. 3-0.209 · 2-1 ball called strike
    Joe Mack vs Bryan Abreu

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

  1. 1Kyle Stowers — ump said strike, robot ruled strike: upheld.
  2. 2Christian Vázquez — ump said strike, robot ruled ball: overturned.
  3. 3Yainer Diaz — ump said ball, robot ruled strike: overturned.
  4. 4Christian Vázquez — ump said ball, robot ruled ball: upheld.
  5. 5Joe Mack — ump said ball, robot ruled ball: upheld.

Our tracked-rulebook zone matched the ABS ruling on 2 of 5 — a zone-definition gap (ABS grades a standardized, height-based zone), not our error.

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