Blue Notes · Umpire Grade2026-04-22
“A steady night's work behind the plate.”
Umpire Grade
96.0% accurate
Run Favor
runs, HOU
ABS Overturns
of 6 reviewed
What this shows — how Alex Tosi called the 149 pitches that were taken (no swing), graded against the tracked rulebook strike zone. He got 143 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▲2 · 2-2 strike called ball· challenged ✓
Cam Smith vs Tanner Bibee - 2-0.20▼2 · 2-1 ball called strike· challenged ✓
Bo Naylor vs Peter Lambert - 3-0.19▼8 · 2-0 ball called strike
Steven Kwan vs Steven Okert
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
6 pitches went to the robots · 4 overturned (ump overruled) · 2 upheld (ump confirmed). This is the ABS system’s own measurement — Hawk-Eye optical ball-tracking, not our model.
- 1Bo Naylor — ump said ball, robot ruled strike: overturned.
- 2Bo Naylor — ump said strike, robot ruled ball: overturned.
- 3Jose Altuve — ump said strike, robot ruled ball: overturned.
- 4Christian Vázquez — ump said ball, robot ruled strike: overturned.
- 5Bo Naylor — ump said ball, robot ruled ball: upheld.
- 6Christian Vázquez — ump said ball, robot ruled ball: upheld.
Our tracked-rulebook zone matched the ABS ruling on 4 of 6 — a zone-definition gap (ABS grades a standardized, height-based zone), not our error.