Blue Notes · Umpire Grade2026-06-22
AZ @ STL
Home plate: Nate Tomlinson
“Reliable as a Tuesday: no complaints, no headlines.”
Umpire Grade
95.3% accurate
Run Favor
runs, STL
ABS Overturns
of 2 reviewed
What this shows — how Nate Tomlinson called the 129 pitches that were taken (no swing), graded against the tracked rulebook strike zone. He got 123 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+0.23▼8 · 0-2 strike called ball
Masyn Winn vs Jonathan Loáisiga - 2+0.10▼6 · 0-1 strike called ball
Blaze Jordan vs Merrill Kelly - 3+0.09▲3 · 0-0 strike called ball
Geraldo Perdomo vs Andre Pallante
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
2 pitches went to the robots · 1 overturned (ump overruled) · 1 upheld (ump confirmed). This is Hawkeye ground truth, no model involved.
- 1Lars Nootbaar — ump said strike, robot ruled strike: upheld.
- 2Adrian Del Castillo — ump said strike, robot ruled ball: overturned.
Our tracked-rulebook zone matched the ABS ruling on 1 of 2 — a zone-definition gap (ABS grades a standardized, height-based zone), not our error.