Blue Notes · Umpire Grade2026-04-01
“The zone kept to itself — the hitters said thanks.”
Umpire Grade
92.3% accurate
Run Favor
runs, PIT
ABS Overturns
of 5 reviewed
What this shows — how Rob Drake called the 156 pitches that were taken (no swing), graded against the tracked rulebook strike zone. He got 144 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+0.23▼9 · 0-2 strike called ball· challenged ✓
Tyler Stephenson vs Gregory Soto - 2-0.19▼5 · 2-0 ball called strike
TJ Friedl vs Paul Skenes - 3+0.13▲7 · 1-1 strike called ball· challenged ✓
Marcell Ozuna vs Graham Ashcraft
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
5 pitches went to the robots · 3 overturned (ump overruled) · 2 upheld (ump confirmed). This is Hawkeye ground truth, no model involved.
- 1Nick Yorke — ump said ball, robot ruled strike: overturned.
- 2Spencer Steer — ump said strike, robot ruled strike: upheld.
- 3Marcell Ozuna — ump said ball, robot ruled strike: overturned.
- 4Gregory Soto — ump said ball, robot ruled ball: upheld.
- 5Tyler Stephenson — ump said ball, robot ruled strike: overturned.
Our tracked-rulebook zone matched the ABS ruling on 4 of 5 — a zone-definition gap (ABS grades a standardized, height-based zone), not our error.