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Blue Notes · Umpire Grade2026-09-12

PHI @ ATL

Home plate: Adam Hamari

“A busy night for the machines in the truck.”

B-
Umpire Grade
91.8% accurate
0.4
Run Favor
runs, ATL
5
ABS Overturns
of 7 reviewed

What this shows — how Adam Hamari called the 147 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. 135 were right. Below, only the misses are plotted, alongside every challenged pitch.

The zone, as he called it

Challenge 1: J.T. Realmuto — the ump called it a ball, the robot ruled strike (OVERTURNED — ump overruled).1Challenge 2: Kyle Schwarber — the ump called it a strike, the robot ruled ball (OVERTURNED — ump overruled).2Challenge 3: Sean Murphy — the ump called it a ball, the robot ruled strike (OVERTURNED — ump overruled).3Challenge 4: Bryce Harper — the ump called it a strike, the robot ruled strike (upheld — ump confirmed).4Challenge 5: Ronald Acuña Jr. — the ump called it a strike, the robot ruled ball (OVERTURNED — ump overruled). Our tracking puts it on the other side of the line; the grade follows the ruling.5*Challenge 6: Sean Murphy — the ump called it a ball, the robot ruled strike (OVERTURNED — ump overruled).6Challenge 7: Sean Murphy — the ump called it a ball, the robot ruled ball (upheld — ump confirmed).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+0.28▼1 · 1-2 strike called ball· challenged ✓
    Drake Baldwin vs Tim Mayza
  2. 2+0.28▼4 · 1-2 strike called ball
    Matt Olson vs Brooks Raley
  3. 3+0.23▲8 · 0-2 strike called ball
    Kyle Schwarber vs Brent Suter

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. 1J.T. Realmuto — ump said ball, robot ruled strike: overturned.
  2. 2Kyle Schwarber — ump said strike, robot ruled ball: overturned.
  3. 3Sean Murphy — ump said ball, robot ruled strike: overturned.
  4. 4Bryce Harper — ump said strike, robot ruled strike: upheld.
  5. 5Ronald Acuña Jr. — ump said strike, robot ruled ball: overturned.
  6. 6Sean Murphy — ump said ball, robot ruled strike: overturned.
  7. 7Sean Murphy — ump said ball, robot ruled ball: upheld.

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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