Blue Notes · Umpire Grade2026-06-09
CHC @ COL
Home plate: David Rackley
“Borderline went to the battery all night.”
Umpire Grade
91.7% accurate
Run Favor
runs, COL
ABS Overturns
of 7 reviewed
What this shows — how David Rackley called the 145 pitches that were taken (no swing), graded against the tracked rulebook strike zone. He got 133 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▲8 · 2-2 ball called strike· challenged
Michael Busch vs Antonio Senzatela - 2-0.30▲8 · 3-1 ball called strike· challenged
Ian Happ vs Antonio Senzatela - 3+0.13▲4 · 1-1 strike called ball
Miguel Amaya vs Tomoyuki Sugano
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
7 pitches went to the robots · 4 overturned (ump overruled) · 3 upheld (ump confirmed). This is Hawkeye ground truth, no model involved.
- 1Michael Busch — ump said ball, robot ruled strike: overturned.
- 2Hunter Goodman — ump said ball, robot ruled ball: upheld.
- 3Miguel Amaya — ump said strike, robot ruled ball: overturned.
- 4Hunter Goodman — ump said strike, robot ruled ball: overturned.
- 5Michael Busch — ump said ball, robot ruled strike: overturned.
- 6Michael Busch — ump said strike, robot ruled strike: upheld.
- 7Ian Happ — ump said strike, robot ruled strike: upheld.
Our tracked-rulebook zone matched the ABS ruling on 2 of 7 — a zone-definition gap (ABS grades a standardized, height-based zone), not our error.