Blue Notes · Umpire Grade2026-06-04
ATH @ CHC
Home plate: Steven Jaschinski
“Reliable as a Tuesday: no complaints, no headlines.”
Umpire Grade
97.8% accurate
Run Favor
runs, ATH
ABS Overturns
of 3 reviewed
What this shows — how Steven Jaschinski called the 137 pitches that were taken (no swing), graded against the tracked rulebook strike zone. He got 134 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+0.69▲7 · 3-2 strike called ball
Zack Gelof vs Trent Thornton - 2+0.10▼7 · 0-1 strike called ball
Pedro Ramírez vs Scott Barlow - 3-0.09▲9 · 0-0 ball called strike
Zack Gelof vs Ryan Rolison
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
3 pitches went to the robots · 2 overturned (ump overruled) · 1 upheld (ump confirmed). This is Hawkeye ground truth, no model involved.
- 1Moisés Ballesteros — ump said strike, robot ruled ball: overturned.
- 2Nico Hoerner — ump said ball, robot ruled strike: overturned.
- 3Jonah Heim — ump said ball, robot ruled ball: upheld.
Our tracked-rulebook zone matched the ABS ruling on 1 of 3 — a zone-definition gap (ABS grades a standardized, height-based zone), not our error.