Blue Notes · Umpire Grade2026-04-18
“Down the middle. Both dugouts had the same zone.”
Umpire Grade
93.9% accurate
Run Favor
runs, CHC
ABS Overturns
of 2 reviewed
What this shows — how Alex Tosi called the 147 pitches that were taken (no swing), graded against the tracked rulebook strike zone. He got 138 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▼6 · 3-2 strike called ball· challenged
Seiya Suzuki vs Freddy Peralta - 2-0.20▲3 · 2-1 ball called strike
MJ Melendez vs Jameson Taillon - 3-0.19▼8 · 2-0 ball called strike
Seiya Suzuki vs Craig Kimbrel
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.
- 1Miguel Amaya — ump said strike, robot ruled ball: overturned.
- 2Francisco Alvarez — ump said ball, robot ruled ball: upheld.
Our tracked-rulebook zone matched the ABS ruling on 0 of 2 — a zone-definition gap (ABS grades a standardized, height-based zone), not our error.