Blue Notes · Umpire Grade2026-04-01
SF @ SD
Home plate: Ryan Additon
“The zone kept its promises.”
Umpire Grade
95.2% accurate
Run Favor
runs, SF
ABS Overturns
of 1 reviewed
What this shows — how Ryan Additon called the 146 pitches that were taken (no swing), graded against the tracked rulebook strike zone. He got 139 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▲3 · 2-2 strike called ball
Rafael Devers vs Nick Pivetta - 2+0.20▲6 · 2-1 strike called ball
Heliot Ramos vs Jeremiah Estrada - 3+0.19▲5 · 2-0 strike called ball
Jung Hoo Lee vs Nick Pivetta
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
1 pitch went to the robots · 0 overturned (ump overruled) · 1 upheld (ump confirmed). This is Hawkeye ground truth, no model involved.
- 1Freddy Fermin — ump said ball, robot ruled ball: upheld.
Our tracked-rulebook zone matched the ABS ruling on 1 of 1 — a zone-definition gap (ABS grades a standardized, height-based zone), not our error.