Blue Notes · Umpire Grade2026-05-07
“The zone kept its promises.”
Umpire Grade
93.7% accurate
Run Favor
runs, KC
ABS Overturns
of 4 reviewed
What this shows — how Nic Lentz called the 223 pitches that were taken (no swing), graded against the tracked rulebook strike zone. He got 209 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▲1 · 2-2 strike called ball
José Ramírez vs Seth Lugo - 2+0.30▼2 · 3-1 strike called ball
Isaac Collins vs Slade Cecconi - 3-0.30▲9 · 3-1 ball called strike
Petey Halpin vs Nick Mears
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 · 0 overturned (ump overruled) · 4 upheld (ump confirmed). This is Hawkeye ground truth, no model involved.
- 1Carter Jensen — ump said ball, robot ruled ball: upheld.
- 2Maikel Garcia — ump said strike, robot ruled strike: upheld.
- 3Bo Naylor — ump said strike, robot ruled strike: upheld.
- 4Steven Kwan — ump said strike, robot ruled strike: upheld.
Our tracked-rulebook zone matched the ABS ruling on 4 of 4 — a zone-definition gap (ABS grades a standardized, height-based zone), not our error.