Fever BaseballFuture Value Radar (FVR) · On the record
RECORD: 0 HIT · 0 MISS · 12 OPEN · FIRST CALL RESOLVES AUG 12
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Blue Notes · Umpire Grade2026-05-08

TB @ BOS

Home plate: Steven Jaschinski

“Down the middle. Both dugouts had the same zone.”

B+
Umpire Grade
93.6% accurate
1.0
Run Favor
runs, BOS
2
ABS Overturns
of 5 reviewed

What this shows — how Steven Jaschinski called the 125 pitches that were taken (no swing), graded against the tracked rulebook strike zone. He got 117 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: Carlos Narváez — the ump called it a strike, the robot ruled ball (OVERTURNED — ump overruled).1Challenge 2: Willson Contreras — the ump called it a ball, the robot ruled strike (OVERTURNED — ump overruled).2Challenge 3: Nick Fortes — the ump called it a ball, the robot ruled ball (upheld — ump confirmed).3Challenge 4: Jonathan Aranda — the ump called it a strike, the robot ruled strike (upheld — ump confirmed).4Challenge 5: Ceddanne Rafaela — the ump called it a strike, the robot ruled strike (upheld — ump confirmed).5
strike called ballball called strikeABS overturnedABS upheld

The calls that moved the game

  1. 1+0.28▼6 · 1-2 strike called ball
    Ceddanne Rafaela vs Mason Englert
  2. 2+0.28▼8 · 1-2 strike called ball
    Trevor Story vs Mason Englert
  3. 3-0.13▲4 · 1-1 ball called strike
    Jonathan Aranda vs Connelly Early

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 Hawkeye ground truth, no model involved.

  1. 1Carlos Narváez — ump said strike, robot ruled ball: overturned.
  2. 2Willson Contreras — ump said ball, robot ruled strike: overturned.
  3. 3Nick Fortes — ump said ball, robot ruled ball: upheld.
  4. 4Jonathan Aranda — ump said strike, robot ruled strike: upheld.
  5. 5Ceddanne Rafaela — ump said strike, robot ruled strike: 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.