Blue Notes · Umpire Grade2026-04-07
ATL @ LAA
Home plate: Edwin Moscoso
“Pitchers earned every strike the hard way.”
Umpire Grade
92.1% accurate
Run Favor
runs, ATL
ABS Overturns
of 4 reviewed
What this shows — how Edwin Moscoso called the 165 pitches that were taken (no swing), graded against the tracked rulebook strike zone. He got 152 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▲2 · 2-2 strike called ball
Matt Olson vs Yusei Kikuchi - 2+0.39▲8 · 2-2 strike called ball
Matt Olson vs Shaun Anderson - 3+0.39▼8 · 2-2 strike called ball
Yoán Moncada vs Aaron Bummer
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 · 1 overturned (ump overruled) · 3 upheld (ump confirmed). This is Hawkeye ground truth, no model involved.
- 1Jonah Heim — ump said ball, robot ruled ball: upheld.
- 2Jonah Heim — ump said strike, robot ruled ball: overturned.
- 3Jonah Heim — ump said ball, robot ruled ball: upheld.
- 4Nolan Schanuel — ump said strike, robot ruled strike: upheld.
Our tracked-rulebook zone matched the ABS ruling on 3 of 4 — a zone-definition gap (ABS grades a standardized, height-based zone), not our error.