Blue Notes · Umpire Grade2026-04-19
STL @ HOU
Home plate: Lance Barrett
“The kind of night where the umpire is the least of the story.”
Umpire Grade
91.9% accurate
Run Favor
runs, HOU
ABS Overturns
of 4 reviewed
What this shows — how Lance Barrett called the 186 pitches that were taken (no swing), graded against the tracked rulebook strike zone. He got 171 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▼3 · 2-2 strike called ball
Shay Whitcomb vs Matthew Liberatore - 2-0.39▼9 · 2-2 ball called strike
Yainer Diaz vs Riley O'Brien - 3+0.28▼4 · 1-2 strike called ball
Christian Walker vs Matthew Liberatore
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 Hawkeye ground truth, no model involved.
- 1Yainer Diaz — ump said strike, robot ruled ball: overturned.
- 2Yainer Diaz — ump said strike, robot ruled ball: overturned.
- 3Victor Scott II — ump said strike, robot ruled strike: upheld.
- 4Yainer Diaz — ump said ball, robot ruled ball: upheld.
Our tracked-rulebook zone matched the ABS ruling on 2 of 4 — a zone-definition gap (ABS grades a standardized, height-based zone), not our error.