Blue Notes · Umpire Grade2026-03-29
“The grade leaned — the ledger says which way.”
Umpire Grade
92.7% accurate
Run Favor
runs, BOS
ABS Overturns
of 4 reviewed
What this shows — how Adam Beck called the 165 pitches that were taken (no swing), graded against the tracked rulebook strike zone. He got 153 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
Jarren Duran vs Brock Burke - 2+0.20▼5 · 2-1 strike called ball
TJ Friedl vs Connelly Early - 3+0.19▲5 · 2-0 strike called ball
Roman Anthony vs Rhett Lowder
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 · 2 overturned (ump overruled) · 2 upheld (ump confirmed). This is the ABS system’s own measurement — Hawk-Eye optical ball-tracking, not our model.
- 1Marcelo Mayer — ump said strike, robot ruled strike: upheld.
- 2Tyler Stephenson — ump said ball, robot ruled ball: upheld.
- 3Connor Wong — ump said ball, robot ruled strike: overturned.
- 4Tyler Stephenson — 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.