Fever BaseballFor collectors and stat nerdsFuture Value Radar (FVR) · On the record
Blue Notes · Umpire Grade2026-05-16

SF @ ATH

Home plate: Cory Blaser

Nothing off the plate, and not much on the black either.

C+
Umpire Grade
90.2% accurate
0.3
Run Favor
runs, ATH
2
ABS Overturns
of 4 reviewed

What this shows — how Cory Blaser called the 133 pitches that were taken (no swing), graded against the tracked rulebook strike zone. He got 120 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: Brent Rooker — the ump called it a strike, the robot ruled ball (OVERTURNED — ump overruled).1Challenge 2: Rafael Devers — the ump called it a strike, the robot ruled strike (upheld — ump confirmed).2Challenge 3: Shea Langeliers — the ump called it a ball, the robot ruled strike (OVERTURNED — ump overruled).3Challenge 4: Jesus Rodriguez — the ump called it a ball, the robot ruled ball (upheld — ump confirmed).4
strike called ballball called strikeABS overturnedABS upheld

The calls that moved the game

  1. 1+0.395 · 2-2 strike called ball
    Nick Kurtz vs Trevor McDonald
  2. 2-0.283 · 1-2 ball called strike· challenged
    Rafael Devers vs Luis Severino
  3. 3+0.237 · 0-2 strike called ball· challenged
    Drew Gilbert vs Scott Barlow

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

  1. 1Brent Rooker — ump said strike, robot ruled ball: overturned.
  2. 2Rafael Devers — ump said strike, robot ruled strike: upheld.
  3. 3Shea Langeliers — ump said ball, robot ruled strike: overturned.
  4. 4Jesus Rodriguez — ump said ball, robot ruled ball: 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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