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Blue Notes · Umpire Grade2026-08-02

SF @ SD

Home plate: John Tumpane

“The robots earned their keep tonight.”

C+
Umpire Grade
90.9% accurate
0.2
Run Favor
runs, SD
7
ABS Overturns
of 9 reviewed

What this shows — how John Tumpane called the 186 pitches that were taken (no swing), graded against the tracked rulebook strike zone. He got 169 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: Manny Machado — the ump called it a strike, the robot ruled ball (OVERTURNED — ump overruled).1Challenge 2: Luis Campusano — the ump called it a ball, the robot ruled strike (OVERTURNED — ump overruled).2Challenge 3: Drew Cavanaugh — the ump called it a ball, the robot ruled ball (upheld — ump confirmed).3Challenge 4: Luis Campusano — the ump called it a strike, the robot ruled strike (upheld — ump confirmed).4Challenge 5: Sung-Mun Song — the ump called it a strike, the robot ruled ball (OVERTURNED — ump overruled).5Challenge 6: Drew Cavanaugh — the ump called it a ball, the robot ruled strike (OVERTURNED — ump overruled).6Challenge 7: Drew Cavanaugh — the ump called it a ball, the robot ruled strike (OVERTURNED — ump overruled).7Challenge 8: Heliot Ramos — the ump called it a strike, the robot ruled ball (OVERTURNED — ump overruled).8Challenge 9: Drew Cavanaugh — the ump called it a ball, the robot ruled strike (OVERTURNED — ump overruled).9
strike called ballball called strikeABS overturnedABS upheld

The calls that moved the game

  1. 1+0.39▲2 · 2-2 strike called ball
    Rafael Devers vs Kyle Hart
  2. 2-0.30▼2 · 3-1 ball called strike
    Jake Cronenworth vs Landen Roupp
  3. 3+0.28▼6 · 1-2 strike called ball· challenged ✓
    Sung-Mun Song vs Sam Hentges

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

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

  1. 1Manny Machado — ump said strike, robot ruled ball: overturned.
  2. 2Luis Campusano — ump said ball, robot ruled strike: overturned.
  3. 3Drew Cavanaugh — ump said ball, robot ruled ball: upheld.
  4. 4Luis Campusano — ump said strike, robot ruled strike: upheld.
  5. 5Sung-Mun Song — ump said strike, robot ruled ball: overturned.
  6. 6Drew Cavanaugh — ump said ball, robot ruled strike: overturned.
  7. 7Drew Cavanaugh — ump said ball, robot ruled strike: overturned.
  8. 8Heliot Ramos — ump said strike, robot ruled ball: overturned.
  9. 9Drew Cavanaugh — ump said ball, robot ruled strike: overturned.

Our tracked-rulebook zone matched the ABS ruling on 7 of 9 — a zone-definition gap (ABS grades a standardized, height-based zone), not our error.

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