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Blue Notes · Umpire Grade2026-05-03

CIN @ PIT

Home plate: Alan Porter

“The corners were friendlier in one direction tonight.”

C
Umpire Grade
89.7% accurate
1.2
Run Favor
runs, CIN
4
ABS Overturns
of 8 reviewed

What this shows — how Alan Porter called the 117 pitches that were taken (no swing), graded against the tracked rulebook strike zone. He got 105 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: Bryan Reynolds — the ump called it a strike, the robot ruled ball (OVERTURNED — ump overruled).1Challenge 2: Jose Trevino — the ump called it a ball, the robot ruled ball (upheld — ump confirmed).2Challenge 3: Bryan Reynolds — the ump called it a strike, the robot ruled ball (OVERTURNED — ump overruled).3Challenge 4: Joey Bart — the ump called it a ball, the robot ruled strike (OVERTURNED — ump overruled).4Challenge 5: Joey Bart — the ump called it a ball, the robot ruled strike (OVERTURNED — ump overruled).5Challenge 6: Marcell Ozuna — the ump called it a strike, the robot ruled strike (upheld — ump confirmed).6Challenge 7: Spencer Horwitz — the ump called it a strike, the robot ruled strike (upheld — ump confirmed).7Challenge 8: Sal Stewart — the ump called it a strike, the robot ruled strike (upheld — ump confirmed).8
strike called ballball called strikeABS overturnedABS upheld

The calls that moved the game

  1. 1-0.69▼7 · 3-2 ball called strike· challenged ✓
    Bryan Reynolds vs Chase Burns
  2. 2+0.39▲5 · 2-2 strike called ball
    Will Benson vs Braxton Ashcraft
  3. 3+0.28▼7 · 1-2 strike called ball
    Bryan Reynolds vs Chase Burns

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

8 pitches went to the robots · 4 overturned (ump overruled) · 4 upheld (ump confirmed). This is the ABS system’s own measurement — Hawk-Eye optical ball-tracking, not our model.

  1. 1Bryan Reynolds — ump said strike, robot ruled ball: overturned.
  2. 2Jose Trevino — ump said ball, robot ruled ball: upheld.
  3. 3Bryan Reynolds — ump said strike, robot ruled ball: overturned.
  4. 4Joey Bart — ump said ball, robot ruled strike: overturned.
  5. 5Joey Bart — ump said ball, robot ruled strike: overturned.
  6. 6Marcell Ozuna — ump said strike, robot ruled strike: upheld.
  7. 7Spencer Horwitz — ump said strike, robot ruled strike: upheld.
  8. 8Sal Stewart — ump said strike, robot ruled strike: upheld.

Our tracked-rulebook zone matched the ABS ruling on 7 of 8 — a zone-definition gap (ABS grades a standardized, height-based zone), not our error.

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