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Blue Notes · Umpire Grade2026-09-06

NYY @ SD

Home plate: Alan Porter

“The challenge cart got its steps in.”

C
Umpire Grade
89.7% accurate
0.2
Run Favor
runs, SD
5
ABS Overturns
of 8 reviewed

What this shows — how Alan Porter called the 136 pitches that were taken (no swing), graded against the tracked rulebook strike zone, or, on a pitch the ABS (Automated Ball-Strike System) reviewed on a challenge, against its ruling. 122 were right. Below, only the misses are plotted, alongside every challenged pitch.

The zone, as he called it

Challenge 1: George Lombard Jr. — the ump called it a strike, the robot ruled ball (OVERTURNED — ump overruled).1Challenge 2: Austin Wells — the ump called it a ball, the robot ruled strike (OVERTURNED — ump overruled).2Challenge 3: Jasson Domínguez — the ump called it a strike, the robot ruled ball (OVERTURNED — ump overruled).3Challenge 4: Spencer Jones — the ump called it a strike, the robot ruled strike (upheld — ump confirmed).4Challenge 5: Luis Campusano — the ump called it a ball, the robot ruled strike (OVERTURNED — ump overruled).5Challenge 6: Luis Campusano — the ump called it a ball, the robot ruled strike (OVERTURNED — ump overruled).6Challenge 7: Luis Campusano — the ump called it a ball, the robot ruled ball (upheld — ump confirmed). Our tracking puts it on the other side of the line; the grade follows the ruling.7*Challenge 8: Ben Rice — the ump called it a strike, the robot ruled strike (upheld — ump confirmed).8
strike called ballball called strikeABS overturnedABS upheld

* Graded on the ABS ruling. ABS measures its own zone, set by the batter’s height and taken at the middle of the plate, and our tracking puts this pitch on the other side of the line.

The calls that moved the game

  1. 1+0.28▲9 · 1-2 strike called ball· challenged ✓
    Ryan McMahon vs Mason Miller
  2. 2-0.23▲7 · 0-2 ball called strike
    Ryan McMahon vs Bradgley Rodriguez
  3. 3-0.21▲9 · 3-0 ball called strike
    Austin Wells vs Mason Miller

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

  1. 1George Lombard Jr. — ump said strike, robot ruled ball: overturned.
  2. 2Austin Wells — ump said ball, robot ruled strike: overturned.
  3. 3Jasson Domínguez — ump said strike, robot ruled ball: overturned.
  4. 4Spencer Jones — ump said strike, robot ruled strike: upheld.
  5. 5Luis Campusano — ump said ball, robot ruled strike: overturned.
  6. 6Luis Campusano — ump said ball, robot ruled strike: overturned.
  7. 7Luis Campusano — ump said ball, robot ruled ball: upheld.
  8. 8Ben Rice — 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). Where the two disagree, the umpire is graded on the ABS ruling.

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