Blue Notes · Umpire Grade2026-04-28
HOU @ BAL
Home plate: Jordan Baker
“Pitchers earned every strike the hard way.”
Umpire Grade
90.9% accurate
Run Favor
runs, BAL
ABS Overturns
of 4 reviewed
What this shows — how Jordan Baker called the 143 pitches that were taken (no swing), graded against the tracked rulebook strike zone. He got 130 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▼7 · 1-2 strike called ball
Pete Alonso vs Ryan Weiss - 2-0.21▼5 · 3-0 ball called strike
Taylor Ward vs Ryan Weiss - 3-0.20▲9 · 2-1 ball called strike
Isaac Paredes vs Ryan Helsley
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 ball, robot ruled ball: upheld.
- 2Jose Altuve — ump said ball, robot ruled strike: overturned.
- 3Adley Rutschman — ump said strike, robot ruled ball: overturned.
- 4Yainer Diaz — ump said ball, robot ruled ball: upheld.
Our tracked-rulebook zone matched the ABS ruling on 1 of 4 — a zone-definition gap (ABS grades a standardized, height-based zone), not our error.