Blue Notes · Umpire Grade2026-05-10
PIT @ SF
Home plate: Tom Hanahan
“One dugout got the friendlier version of the evening.”
Umpire Grade
89.0% accurate
Run Favor
runs, PIT
ABS Overturns
of 6 reviewed
What this shows — how Tom Hanahan called the 201 pitches that were taken (no swing), graded against the tracked rulebook strike zone. He got 179 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▲1 · 3-2 strike called ball· challenged
Oneil Cruz vs Tyler Mahle - 2+0.39▼2 · 2-2 strike called ball
Rafael Devers vs Bubba Chandler - 3+0.28▼11 · 1-2 strike called ball
Jung Hoo Lee vs Yohan Ramírez
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
6 pitches went to the robots · 2 overturned (ump overruled) · 4 upheld (ump confirmed). This is Hawkeye ground truth, no model involved.
- 1Tyler Mahle — ump said ball, robot ruled ball: upheld.
- 2Matt Chapman — ump said strike, robot ruled strike: upheld.
- 3Marcell Ozuna — ump said ball, robot ruled strike: overturned.
- 4Henry Davis — ump said strike, robot ruled ball: overturned.
- 5Henry Davis — ump said ball, robot ruled ball: upheld.
- 6Jesus Rodriguez — ump said ball, robot ruled ball: upheld.
Our tracked-rulebook zone matched the ABS ruling on 4 of 6 — a zone-definition gap (ABS grades a standardized, height-based zone), not our error.