Fever BaseballFor collectors and stat nerdsFuture Value Radar (FVR) · On the record
Blue Notes · Umpire Grade2026-04-17

BAL @ CLE

Home plate: Nate Tomlinson

The grade leaned — the ledger says which way.

A
Umpire Grade
95.9% accurate
1.2
Run Favor
runs, CLE
1
ABS Overturns
of 2 reviewed

What this shows — how Nate Tomlinson called the 171 pitches that were taken (no swing), graded against the tracked rulebook strike zone. He got 164 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: Samuel Basallo — the ump called it a ball, the robot ruled ball (upheld — ump confirmed).1Challenge 2: Leody Taveras — the ump called it a strike, the robot ruled ball (OVERTURNED — ump overruled).2
strike called ballball called strikeABS overturnedABS upheld

The calls that moved the game

  1. 1-0.698 · 3-2 ball called strike· challenged
    Leody Taveras vs Erik Sabrowski
  2. 2+0.395 · 2-2 strike called ball
    Kyle Manzardo vs Chris Bassitt
  3. 3+0.134 · 1-0 strike called ball
    Bo Naylor vs Chris Bassitt

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

  1. 1Samuel Basallo — ump said ball, robot ruled ball: upheld.
  2. 2Leody Taveras — ump said strike, robot ruled ball: overturned.

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

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