Fever BaseballFor collectors and stat nerdsFuture Value Radar (FVR) · On the record
Blue Notes · Umpire Grade2026-03-30

BOS @ HOU

Home plate: Nate Tomlinson

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

A-
Umpire Grade
94.4% accurate
0.0
Run Favor
runs, BOS
1
ABS Overturns
of 3 reviewed

What this shows — how Nate Tomlinson called the 143 pitches that were taken (no swing), graded against the tracked rulebook strike zone. He got 135 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: Jose Altuve — the ump called it a strike, the robot ruled ball (OVERTURNED — ump overruled).1Challenge 2: Carlos Narváez — the ump called it a ball, the robot ruled ball (upheld — ump confirmed).2Challenge 3: Yainer Diaz — the ump called it a ball, the robot ruled ball (upheld — ump confirmed).3
strike called ballball called strikeABS overturnedABS upheld

The calls that moved the game

  1. 1+0.234 · 0-2 strike called ball· challenged
    Yainer Diaz vs Ranger Suarez
  2. 2-0.208 · 2-1 ball called strike
    Brice Matthews vs Johan Oviedo
  3. 3-0.131 · 1-1 ball called strike· challenged
    Jose Altuve vs Ranger Suarez

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

3 pitches went to the robots · 1 overturned (ump overruled) · 2 upheld (ump confirmed). This is the ABS system’s own measurement — Hawk-Eye optical ball-tracking, not our model.

  1. 1Jose Altuve — ump said strike, robot ruled ball: overturned.
  2. 2Carlos Narváez — ump said ball, robot ruled ball: upheld.
  3. 3Yainer Diaz — ump said ball, robot ruled ball: upheld.

Our tracked-rulebook zone matched the ABS ruling on 2 of 3 — a zone-definition gap (ABS grades a standardized, height-based zone), not our error.

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