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Blue Notes · Umpire Grade2026-08-12

CLE @ DET

Home plate: John Libka

“Hawkeye did more talking than the umpire tonight.”

C+
Umpire Grade
90.6% accurate
0.7
Run Favor
runs, DET
6
ABS Overturns
of 8 reviewed

What this shows — how John Libka called the 181 pitches that were taken (no swing), graded against the tracked rulebook strike zone. He got 164 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: Austin Hedges — the ump called it a ball, the robot ruled strike (OVERTURNED — ump overruled).1Challenge 2: Dillon Dingler — the ump called it a ball, the robot ruled strike (OVERTURNED — ump overruled).2Challenge 3: Spencer Torkelson — the ump called it a strike, the robot ruled ball (OVERTURNED — ump overruled).3Challenge 4: Austin Hedges — the ump called it a ball, the robot ruled strike (OVERTURNED — ump overruled).4Challenge 5: Dillon Dingler — the ump called it a strike, the robot ruled strike (upheld — ump confirmed).5Challenge 6: Austin Hedges — the ump called it a strike, the robot ruled ball (OVERTURNED — ump overruled).6Challenge 7: Javier Báez — the ump called it a strike, the robot ruled strike (upheld — ump confirmed).7Challenge 8: Austin Hedges — the ump called it a ball, the robot ruled strike (OVERTURNED — ump overruled).8
strike called ballball called strikeABS overturnedABS upheld

The calls that moved the game

  1. 1+0.39▼9 · 2-2 strike called ball
    Gleyber Torres vs Cade Smith
  2. 2-0.30▲9 · 3-1 ball called strike· challenged ✓
    Austin Hedges vs Tanner Rainey
  3. 3-0.19▼4 · 2-0 ball called strike
    Corey Julks vs Foster Griffin

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

  1. 1Austin Hedges — ump said ball, robot ruled strike: overturned.
  2. 2Dillon Dingler — ump said ball, robot ruled strike: overturned.
  3. 3Spencer Torkelson — ump said strike, robot ruled ball: overturned.
  4. 4Austin Hedges — ump said ball, robot ruled strike: overturned.
  5. 5Dillon Dingler — ump said strike, robot ruled strike: upheld.
  6. 6Austin Hedges — ump said strike, robot ruled ball: overturned.
  7. 7Javier Báez — ump said strike, robot ruled strike: upheld.
  8. 8Austin Hedges — ump said ball, robot ruled strike: overturned.

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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