Blue Notes · Umpire Grade2026-05-01
KC @ SEA
Home plate: Adam Hamari
“Solid and unspectacular — exactly what the job asks.”
Umpire Grade
93.6% accurate
Run Favor
runs, SEA
ABS Overturns
of 4 reviewed
What this shows — how Adam Hamari called the 156 pitches that were taken (no swing), graded against the tracked rulebook strike zone. He got 146 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+0.20▲7 · 2-1 strike called ball
Maikel Garcia vs Cole Wilcox - 2-0.19▲1 · 2-0 ball called strike
Vinnie Pasquantino vs Bryan Woo - 3-0.10▲1 · 0-1 ball called strike
Maikel Garcia vs Bryan Woo
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
4 pitches went to the robots · 1 overturned (ump overruled) · 3 upheld (ump confirmed). This is Hawkeye ground truth, no model involved.
- 1Salvador Perez — ump said strike, robot ruled ball: overturned.
- 2Leo Rivas — ump said strike, robot ruled strike: upheld.
- 3Salvador Perez — ump said ball, robot ruled ball: upheld.
- 4Randy Arozarena — ump said strike, robot ruled strike: upheld.
Our tracked-rulebook zone matched the ABS ruling on 3 of 4 — a zone-definition gap (ABS grades a standardized, height-based zone), not our error.