Blue Notes · Umpire Grade2026-04-06
CIN @ MIA
Home plate: John Libka
“Called a fair game and let the players decide it.”
Umpire Grade
94.7% accurate
Run Favor
runs, CIN
ABS Overturns
of 1 reviewed
What this shows — how John Libka called the 132 pitches that were taken (no swing), graded against the tracked rulebook strike zone. He got 125 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
strike called ballball called strikeABS overturnedABS upheld
The calls that moved the game
- 1-0.19▼5 · 2-0 ball called strike
Leo Jiménez vs Brandon Williamson - 2-0.13▼7 · 1-0 ball called strike
Xavier Edwards vs Brock Burke - 3+0.10▲4 · 0-1 strike called ball
Sal Stewart vs Janson Junk
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
1 pitch went to the robots · 0 overturned (ump overruled) · 1 upheld (ump confirmed). This is Hawkeye ground truth, no model involved.
- 1Otto Lopez — ump said strike, robot ruled strike: upheld.
Our tracked-rulebook zone matched the ABS ruling on 1 of 1 — a zone-definition gap (ABS grades a standardized, height-based zone), not our error.