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Blue Notes · Umpire Grade2026-06-03

MIA @ WSH

Home plate: Alan Porter

“One side pitched to a slightly bigger plate.”

B+
Umpire Grade
93.6% accurate
1.3
Run Favor
runs, MIA
3
ABS Overturns
of 6 reviewed

What this shows — how Alan Porter called the 172 pitches that were taken (no swing), graded against the tracked rulebook strike zone. He got 161 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: Keibert Ruiz — the ump called it a ball, the robot ruled ball (upheld — ump confirmed).1Challenge 2: Jakob Marsee — the ump called it a strike, the robot ruled ball (OVERTURNED — ump overruled).2Challenge 3: Keibert Ruiz — the ump called it a ball, the robot ruled strike (OVERTURNED — ump overruled).3Challenge 4: Calvin Faucher — the ump called it a ball, the robot ruled ball (upheld — ump confirmed).4Challenge 5: Joe Mack — the ump called it a ball, the robot ruled strike (OVERTURNED — ump overruled).5Challenge 6: Curtis Mead — the ump called it a strike, the robot ruled strike (upheld — ump confirmed).6
strike called ballball called strikeABS overturnedABS upheld

The calls that moved the game

  1. 1+0.39▲5 · 2-2 strike called ball
    Joe Mack vs Andrew Alvarez
  2. 2+0.39▼8 · 2-2 strike called ball· challenged ✓
    James Wood vs Calvin Faucher
  3. 3+0.23▲9 · 0-2 strike called ball
    Kyle Stowers vs Gus Varland

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

  1. 1Keibert Ruiz — ump said ball, robot ruled ball: upheld.
  2. 2Jakob Marsee — ump said strike, robot ruled ball: overturned.
  3. 3Keibert Ruiz — ump said ball, robot ruled strike: overturned.
  4. 4Calvin Faucher — ump said ball, robot ruled ball: upheld.
  5. 5Joe Mack — ump said ball, robot ruled strike: overturned.
  6. 6Curtis Mead — ump said strike, robot ruled strike: upheld.

Our tracked-rulebook zone matched the ABS ruling on 5 of 6 — a zone-definition gap (ABS grades a standardized, height-based zone), not our error.

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