Blue Notes · Umpire Grade2026-03-31
BOS @ HOU
Home plate: Mark Wegner
“Called a fair game and let the players decide it.”
Umpire Grade
95.3% accurate
Run Favor
runs, HOU
ABS Overturns
of 2 reviewed
What this shows — how Mark Wegner called the 148 pitches that were taken (no swing), graded against the tracked rulebook strike zone. He got 141 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▲8 · 2-2 ball called strike
Roman Anthony vs Cody Bolton - 2+0.28▼5 · 1-2 strike called ball
Carlos Correa vs Brayan Bello - 3+0.23▲8 · 0-2 strike called ball
Trevor Story vs Cody Bolton
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
2 pitches went to the robots · 1 overturned (ump overruled) · 1 upheld (ump confirmed). This is Hawkeye ground truth, no model involved.
- 1Yainer Diaz — ump said strike, robot ruled ball: overturned.
- 2Ceddanne Rafaela — ump said strike, robot ruled strike: upheld.
Our tracked-rulebook zone matched the ABS ruling on 1 of 2 — a zone-definition gap (ABS grades a standardized, height-based zone), not our error.