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Blue Notes · Umpire Grade2026-06-30

MIN @ HOU

Home plate: John Tumpane

“The robots earned their keep tonight.”

B+
Umpire Grade
94.0% accurate
0.2
Run Favor
runs, HOU
6
ABS Overturns
of 8 reviewed

What this shows — how John Tumpane called the 133 pitches that were taken (no swing), graded against the tracked rulebook strike zone. He got 125 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: Christian Walker — the ump called it a strike, the robot ruled ball (OVERTURNED — ump overruled).1Challenge 2: Yainer Diaz — the ump called it a ball, the robot ruled strike (OVERTURNED — ump overruled).2Challenge 3: Yainer Diaz — the ump called it a ball, the robot ruled strike (OVERTURNED — ump overruled).3Challenge 4: Jose Altuve — the ump called it a strike, the robot ruled ball (OVERTURNED — ump overruled).4Challenge 5: Victor Caratini — the ump called it a ball, the robot ruled strike (OVERTURNED — ump overruled).5Challenge 6: Cam Smith — the ump called it a strike, the robot ruled ball (OVERTURNED — ump overruled).6Challenge 7: Victor Caratini — the ump called it a ball, the robot ruled ball (upheld — ump confirmed).7Challenge 8: Cam Smith — 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▼4 · 3-2 strike called ball
    Raynel Delgado vs Joe Ryan
  2. 2-0.69▼4 · 3-2 ball called strike· challenged ✓
    Jose Altuve vs Joe Ryan
  3. 3+0.28▼5 · 1-2 strike called ball· challenged ✓
    Christian Walker vs Eric Orze

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

  1. 1Christian Walker — ump said strike, robot ruled ball: overturned.
  2. 2Yainer Diaz — ump said ball, robot ruled strike: overturned.
  3. 3Yainer Diaz — ump said ball, robot ruled strike: overturned.
  4. 4Jose Altuve — ump said strike, robot ruled ball: overturned.
  5. 5Victor Caratini — ump said ball, robot ruled strike: overturned.
  6. 6Cam Smith — ump said strike, robot ruled ball: overturned.
  7. 7Victor Caratini — ump said ball, robot ruled ball: upheld.
  8. 8Cam Smith — 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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