Blue Notes · Umpire Grade2026-05-05
CLE @ KC
Home plate: John Bacon
“Nothing that'll trend, and on this beat that's a compliment.”
Umpire Grade
94.7% accurate
Run Favor
runs, KC
ABS Overturns
of 5 reviewed
What this shows — how John Bacon 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
- 1-0.39▲5 · 2-2 ball called strike
Bo Naylor vs Stephen Kolek - 2+0.13▲2 · 1-1 strike called ball
Kyle Manzardo vs Stephen Kolek - 3-0.09▲6 · 0-0 ball called strike· challenged ✓
José Ramírez vs Stephen Kolek
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 · 4 overturned (ump overruled) · 1 upheld (ump confirmed). This is Hawkeye ground truth, no model involved.
- 1Carter Jensen — ump said strike, robot ruled ball: overturned.
- 2Steven Kwan — ump said ball, robot ruled strike: overturned.
- 3Bo Naylor — ump said ball, robot ruled ball: upheld.
- 4Carter Jensen — ump said strike, robot ruled ball: overturned.
- 5David Fry — 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.