Blue Notes · Umpire Grade2026-05-26
“Solid and unspectacular — exactly what the job asks.”
Umpire Grade
95.2% accurate
Run Favor
runs, BOS
ABS Overturns
of 4 reviewed
What this shows — how Alex Tosi called the 165 pitches that were taken (no swing), graded against the tracked rulebook strike zone. He got 157 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▲5 · 2-2 ball called strike
Ronald Acuña Jr. vs Ranger Suarez - 2+0.28▲6 · 1-2 strike called ball
Ronald Acuña Jr. vs Greg Weissert - 3+0.19▼2 · 2-0 strike called ball
Mickey Gasper vs Spencer Strider
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.
- 1Ranger Suarez — ump said ball, robot ruled ball: upheld.
- 2Chadwick Tromp — ump said strike, robot ruled ball: overturned.
- 3Ceddanne Rafaela — ump said strike, robot ruled strike: upheld.
- 4Ozzie Albies — 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.