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Blue Notes · Umpire Grade2026-04-24

MIA @ SF

Home plate: Dan Bellino

“A pitcher's-nightmare zone — you had to paint it to get it.”

B-
Umpire Grade
91.8% accurate
0.7
Run Favor
runs, MIA
3
ABS Overturns
of 7 reviewed

What this shows — how Dan Bellino called the 158 pitches that were taken (no swing), graded against the tracked rulebook strike zone. He got 145 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: Matt Chapman — the ump called it a strike, the robot ruled ball (OVERTURNED — ump overruled).1Challenge 2: Liam Hicks — the ump called it a ball, the robot ruled strike (OVERTURNED — ump overruled).2Challenge 3: Casey Schmitt — the ump called it a strike, the robot ruled strike (upheld — ump confirmed).3Challenge 4: Sandy Alcantara — the ump called it a ball, the robot ruled ball (upheld — ump confirmed).4Challenge 5: Heliot Ramos — the ump called it a strike, the robot ruled ball (OVERTURNED — ump overruled).5Challenge 6: Liam Hicks — the ump called it a ball, the robot ruled ball (upheld — ump confirmed).6Challenge 7: Jerar Encarnacion — the ump called it a strike, the robot ruled strike (upheld — ump confirmed).7
strike called ballball called strikeABS overturnedABS upheld

The calls that moved the game

  1. 1-0.30▼6 · 3-1 ball called strike· challenged ✓
    Heliot Ramos vs Sandy Alcantara
  2. 2+0.23▲2 · 0-2 strike called ball
    Connor Norby vs Adrian Houser
  3. 3+0.20▲1 · 2-1 strike called ball
    Jakob Marsee vs Adrian Houser

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

  1. 1Matt Chapman — ump said strike, robot ruled ball: overturned.
  2. 2Liam Hicks — ump said ball, robot ruled strike: overturned.
  3. 3Casey Schmitt — ump said strike, robot ruled strike: upheld.
  4. 4Sandy Alcantara — ump said ball, robot ruled ball: upheld.
  5. 5Heliot Ramos — ump said strike, robot ruled ball: overturned.
  6. 6Liam Hicks — ump said ball, robot ruled ball: upheld.
  7. 7Jerar Encarnacion — ump said strike, robot ruled strike: upheld.

Our tracked-rulebook zone matched the ABS ruling on 6 of 7 — a zone-definition gap (ABS grades a standardized, height-based zone), not our error.

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