Blue Notes · Umpire Grade2026-05-16
SF @ ATH
Home plate: Cory Blaser
“Nothing off the plate, and not much on the black either.”
Umpire Grade
91.7% accurate
Run Favor
runs, ATH
ABS Overturns
of 4 reviewed
What this shows — how Cory Blaser called the 133 pitches that were taken (no swing), graded against the tracked rulebook strike zone. He got 122 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▼5 · 2-2 strike called ball
Nick Kurtz vs Trevor McDonald - 2-0.28▲3 · 1-2 ball called strike· challenged
Rafael Devers vs Luis Severino - 3-0.21▼8 · 3-0 ball called strike
Shea Langeliers vs Erik Miller
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.
- 1Brent Rooker — ump said ball, robot ruled strike: overturned.
- 2Rafael Devers — ump said strike, robot ruled strike: upheld.
- 3Shea Langeliers — ump said strike, robot ruled ball: overturned.
- 4Jesus Rodriguez — 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.