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Blue Notes · Umpire Grade2026-05-09

COL @ PHI

Home plate: John Bacon

“The plate grew a few inches after the first pitch.”

B+
Umpire Grade
93.7% accurate
0.7
Run Favor
runs, PHI
4
ABS Overturns
of 6 reviewed

What this shows — how John Bacon called the 126 pitches that were taken (no swing), graded against the tracked rulebook strike zone. He got 118 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: Edouard Julien — the ump called it a strike, the robot ruled ball (OVERTURNED — ump overruled).1Challenge 2: TJ Rumfield — the ump called it a strike, the robot ruled strike (upheld — ump confirmed).2Challenge 3: Jake McCarthy — the ump called it a strike, the robot ruled ball (OVERTURNED — ump overruled).3Challenge 4: Justin Crawford — the ump called it a strike, the robot ruled ball (OVERTURNED — ump overruled).4Challenge 5: J.T. Realmuto — the ump called it a ball, the robot ruled strike (OVERTURNED — ump overruled).5Challenge 6: Willi Castro — the ump called it a strike, the robot ruled strike (upheld — ump confirmed).6
strike called ballball called strikeABS overturnedABS upheld

The calls that moved the game

  1. 1-0.69▲4 · 3-2 ball called strike· challenged ✓
    Jake McCarthy vs Aaron Nola
  2. 2-0.28▲1 · 1-2 ball called strike· challenged ✓
    Edouard Julien vs Aaron Nola
  3. 3-0.20▼6 · 2-1 ball called strike
    Kyle Schwarber vs Tanner Gordon

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

6 pitches went to the robots · 4 overturned (ump overruled) · 2 upheld (ump confirmed). This is the ABS system’s own measurement — Hawk-Eye optical ball-tracking, not our model.

  1. 1Edouard Julien — ump said strike, robot ruled ball: overturned.
  2. 2TJ Rumfield — ump said strike, robot ruled strike: upheld.
  3. 3Jake McCarthy — ump said strike, robot ruled ball: overturned.
  4. 4Justin Crawford — ump said strike, robot ruled ball: overturned.
  5. 5J.T. Realmuto — ump said ball, robot ruled strike: overturned.
  6. 6Willi Castro — ump said strike, robot ruled strike: upheld.

Our tracked-rulebook zone matched the ABS ruling on 6 of 6 — a zone-definition gap (ABS grades a standardized, height-based zone), not our error.

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