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Blue Notes · Umpire Grade2026-09-04

DET @ CLE

Home plate: Manny Gonzalez

“The robots earned their keep tonight.”

C+
Umpire Grade
90.1% accurate
0.1
Run Favor
runs, DET
5
ABS Overturns
of 7 reviewed

What this shows — how Manny Gonzalez called the 151 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. 136 were right. Below, only the misses are plotted, alongside every challenged pitch.

The zone, as he called it

Challenge 1: Angel Martínez — the ump called it a strike, the robot ruled strike (upheld — ump confirmed).1Challenge 2: Austin Hedges — the ump called it a ball, the robot ruled strike (OVERTURNED — ump overruled). Our tracking puts it on the other side of the line; the grade follows the ruling.2*Challenge 3: Spencer Torkelson — the ump called it a strike, the robot ruled ball (OVERTURNED — ump overruled).3Challenge 4: Eduardo Valencia — the ump called it a ball, the robot ruled ball (upheld — ump confirmed).4Challenge 5: Steven Kwan — the ump called it a strike, the robot ruled ball (OVERTURNED — ump overruled).5Challenge 6: Austin Hedges — the ump called it a ball, the robot ruled strike (OVERTURNED — ump overruled).6Challenge 7: Eduardo Valencia — the ump called it a ball, the robot ruled strike (OVERTURNED — ump overruled).7
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+0.69▼3 · 3-2 strike called ball
    Steven Kwan vs Andrew Sears
  2. 2+0.28▼5 · 1-2 strike called ball
    Steven Kwan vs Andrew Sears
  3. 3+0.20▲5 · 2-1 strike called ball
    Kevin McGonigle vs Foster Griffin

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

7 pitches went to the robots · 5 overturned (ump overruled) · 2 upheld (ump confirmed). This is the ABS system’s own measurement — Hawk-Eye optical ball-tracking, not our model.

  1. 1Angel Martínez — ump said strike, robot ruled strike: upheld.
  2. 2Austin Hedges — ump said ball, robot ruled strike: overturned.
  3. 3Spencer Torkelson — ump said strike, robot ruled ball: overturned.
  4. 4Eduardo Valencia — ump said ball, robot ruled ball: upheld.
  5. 5Steven Kwan — ump said strike, robot ruled ball: overturned.
  6. 6Austin Hedges — ump said ball, robot ruled strike: overturned.
  7. 7Eduardo Valencia — ump said ball, robot ruled strike: overturned.

Our tracked-rulebook zone matched the ABS ruling on 6 of 7 — 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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