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RECORD: 0 HIT · 0 MISS · 12 OPEN · FIRST CALL RESOLVES AUG 12
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Blue Notes · Umpire Grade2026-04-07

AZ @ NYM

Home plate: Brian O'Nora

“The zone kept its promises.”

A-
Umpire Grade
94.4% accurate
0.0
Run Favor
runs, AZ
3
ABS Overturns
of 5 reviewed

What this shows — how Brian O'Nora called the 195 pitches that were taken (no swing), graded against the tracked rulebook strike zone. He got 184 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: Luis Robert Jr. — the ump called it a ball, the robot ruled strike (OVERTURNED — ump overruled).1Challenge 2: Adrian Del Castillo — the ump called it a ball, the robot ruled strike (OVERTURNED — ump overruled).2Challenge 3: Gabriel Moreno — the ump called it a ball, the robot ruled ball (upheld — ump confirmed).3Challenge 4: Bo Bichette — the ump called it a strike, the robot ruled strike (upheld — ump confirmed).4Challenge 5: Francisco Alvarez — the ump called it a ball, the robot ruled strike (OVERTURNED — ump overruled).5
strike called ballball called strikeABS overturnedABS upheld

The calls that moved the game

  1. 1+0.39▲1 · 2-2 strike called ball
    Ketel Marte vs Freddy Peralta
  2. 2-0.21▲10 · 3-0 ball called strike
    Tim Tawa vs Luke Weaver
  3. 3-0.13▼2 · 1-0 ball called strike
    Bo Bichette vs Zac Gallen

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

5 pitches went to the robots · 3 overturned (ump overruled) · 2 upheld (ump confirmed). This is Hawkeye ground truth, no model involved.

  1. 1Luis Robert Jr. — ump said ball, robot ruled strike: overturned.
  2. 2Adrian Del Castillo — ump said ball, robot ruled strike: overturned.
  3. 3Gabriel Moreno — ump said ball, robot ruled ball: upheld.
  4. 4Bo Bichette — ump said strike, robot ruled strike: upheld.
  5. 5Francisco Alvarez — ump said ball, robot ruled strike: overturned.

Our tracked-rulebook zone matched the ABS ruling on 2 of 5 — a zone-definition gap (ABS grades a standardized, height-based zone), not our error.