Blue Notes · Umpire Grade2026-04-07
STL @ WSH
Home plate: Derek Thomas
“Down the middle. Both dugouts had the same zone.”
Umpire Grade
93.3% accurate
Run Favor
runs, WSH
ABS Overturns
of 5 reviewed
What this shows — how Derek Thomas called the 208 pitches that were taken (no swing), graded against the tracked rulebook strike zone. He got 194 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▲4 · 2-2 strike called ball
Pedro Pagés vs Cade Cavalli - 2+0.28▼8 · 1-2 strike called ball
James Wood vs George Soriano - 3+0.23▼9 · 0-2 strike called ball
Luis García Jr. vs George Soriano
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 · 1 overturned (ump overruled) · 4 upheld (ump confirmed). This is Hawkeye ground truth, no model involved.
- 1Pedro Pagés — ump said strike, robot ruled ball: overturned.
- 2Jordan Walker — ump said strike, robot ruled strike: upheld.
- 3Keibert Ruiz — ump said ball, robot ruled ball: upheld.
- 4Keibert Ruiz — ump said ball, robot ruled ball: upheld.
- 5Pedro Pagés — ump said ball, robot ruled ball: upheld.
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.