Blue Notes · Umpire Grade2026-05-20
TOR @ NYY
Home plate: Brock Ballou
“Nothing off the plate, and not much on the black either.”
Umpire Grade
92.7% accurate
Run Favor
runs, NYY
ABS Overturns
of 3 reviewed
What this shows — how Brock Ballou called the 124 pitches that were taken (no swing), graded against the tracked rulebook strike zone. He got 115 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+0.28▼3 · 1-2 strike called ball
Austin Wells vs Trey Yesavage - 2-0.19▼2 · 2-0 ball called strike
Trent Grisham vs Trey Yesavage - 3+0.13▼9 · 1-0 strike called ball
Amed Rosario vs Louis Varland
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
3 pitches went to the robots · 1 overturned (ump overruled) · 2 upheld (ump confirmed). This is Hawkeye ground truth, no model involved.
- 1Austin Wells — ump said ball, robot ruled ball: upheld.
- 2Ryan McMahon — ump said ball, robot ruled strike: overturned.
- 3Anthony Volpe — ump said strike, robot ruled strike: upheld.
Our tracked-rulebook zone matched the ABS ruling on 2 of 3 — a zone-definition gap (ABS grades a standardized, height-based zone), not our error.