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Blue Notes · Umpire Grade2026-09-02

BAL @ COL

Home plate: John Bacon

“You had to throw it down Broadway to get the call.”

C+
Umpire Grade
90.9% accurate
0.9
Run Favor
runs, COL
2
ABS Overturns
of 8 reviewed

What this shows — how John Bacon called the 143 pitches that were taken (no swing), graded against the tracked rulebook strike zone. He got 130 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: Connor Norby — the ump called it a strike, the robot ruled strike (upheld — ump confirmed).1Challenge 2: Samuel Basallo — the ump called it a ball, the robot ruled ball (upheld — ump confirmed).2Challenge 3: Samuel Basallo — the ump called it a ball, the robot ruled strike (OVERTURNED — ump overruled).3Challenge 4: Cole Carrigg — the ump called it a strike, the robot ruled strike (upheld — ump confirmed).4Challenge 5: Samuel Basallo — the ump called it a ball, the robot ruled strike (OVERTURNED — ump overruled).5Challenge 6: Gunnar Henderson — the ump called it a strike, the robot ruled strike (upheld — ump confirmed).6Challenge 7: Jackson Holliday — the ump called it a strike, the robot ruled strike (upheld — ump confirmed).7Challenge 8: Cole Carrigg — 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+0.39▼10 · 2-2 strike called ball
    Connor Norby vs Alex Hoppe
  2. 2+0.28▼5 · 1-2 strike called ball· challenged ✓
    Ezequiel Tovar vs Trevor Rogers
  3. 3-0.28▼6 · 1-2 ball called strike
    Connor Norby vs Trevor Rogers

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

  1. 1Connor Norby — ump said strike, robot ruled strike: upheld.
  2. 2Samuel Basallo — ump said ball, robot ruled ball: upheld.
  3. 3Samuel Basallo — ump said ball, robot ruled strike: overturned.
  4. 4Cole Carrigg — ump said strike, robot ruled strike: upheld.
  5. 5Samuel Basallo — ump said ball, robot ruled strike: overturned.
  6. 6Gunnar Henderson — ump said strike, robot ruled strike: upheld.
  7. 7Jackson Holliday — ump said strike, robot ruled strike: upheld.
  8. 8Cole Carrigg — 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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