Blue Notes · Umpire Grade2026-04-04
TB @ MIN
Home plate: Nick Mahrley
“Somebody's pitching staff sent a thank-you note.”
Umpire Grade
93.9% accurate
Run Favor
runs, TB
ABS Overturns
of 4 reviewed
What this shows — how Nick Mahrley called the 181 pitches that were taken (no swing), graded against the tracked rulebook strike zone. He got 170 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
- 1-0.69▼3 · 3-2 ball called strike
Luke Keaschall vs Steven Matz - 2+0.20▲1 · 2-1 strike called ball
Yandy Díaz vs Mick Abel - 3+0.20▲8 · 2-1 strike called ball
Jake Fraley vs Zak Kent
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.
- 1Josh Bell — ump said strike, robot ruled strike: upheld.
- 2Luke Keaschall — ump said strike, robot ruled strike: upheld.
- 3Hunter Feduccia — ump said ball, robot ruled ball: upheld.
- 4Jake Fraley — ump said ball, robot ruled strike: overturned.
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.