Fever BaseballFor collectors and stat nerdsFuture Value Radar (FVR) · On the record
Blue Notes · Umpire Grade2026-06-02

TOR @ ATL

Home plate: Mark Wegner

The players kept asking for a second opinion — and kept getting one.

D
Umpire Grade
88.2% accurate
0.4
Run Favor
runs, ATL
5
ABS Overturns
of 6 reviewed

What this shows — how Mark Wegner called the 127 pitches that were taken (no swing), graded against the tracked rulebook strike zone. He got 112 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: Brandon Valenzuela — the ump called it a ball, the robot ruled ball (upheld — ump confirmed).1Challenge 2: Matt Olson — the ump called it a strike, the robot ruled ball (OVERTURNED — ump overruled).2Challenge 3: Sandy León — the ump called it a ball, the robot ruled strike (OVERTURNED — ump overruled).3Challenge 4: Sandy León — the ump called it a ball, the robot ruled strike (OVERTURNED — ump overruled).4Challenge 5: Sandy León — the ump called it a ball, the robot ruled strike (OVERTURNED — ump overruled).5Challenge 6: Sandy León — the ump called it a ball, the robot ruled strike (OVERTURNED — ump overruled).6
strike called ballball called strikeABS overturnedABS upheld

The calls that moved the game

  1. 1+0.281 · 1-2 strike called ball· challenged
    Ronald Acuña Jr. vs Kevin Gausman
  2. 2+0.288 · 1-2 strike called ball· challenged
    Daulton Varsho vs Robert Suarez
  3. 3+0.236 · 0-2 strike called ball
    Mike Yastrzemski vs Kevin Gausman

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

6 pitches went to the robots · 5 overturned (ump overruled) · 1 upheld (ump confirmed). This is the ABS system’s own measurement — Hawk-Eye optical ball-tracking, not our model.

  1. 1Brandon Valenzuela — ump said ball, robot ruled ball: upheld.
  2. 2Matt Olson — ump said strike, robot ruled ball: overturned.
  3. 3Sandy León — ump said ball, robot ruled strike: overturned.
  4. 4Sandy León — ump said ball, robot ruled strike: overturned.
  5. 5Sandy León — ump said ball, robot ruled strike: overturned.
  6. 6Sandy León — ump said ball, robot ruled strike: overturned.

Our tracked-rulebook zone matched the ABS ruling on 4 of 6 — a zone-definition gap (ABS grades a standardized, height-based zone), not our error.

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