Blue Notes · Umpire Grade2026-07-12
CHC @ CIN
Home plate: Alex MacKay
“A bumpy evening behind the dish.”
Umpire Grade
91.4% accurate
Run Favor
runs, CHC
ABS Overturns
of 4 reviewed
What this shows — how Alex MacKay called the 163 pitches that were taken (no swing), graded against the tracked rulebook strike zone. He got 149 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
Seiya Suzuki vs Chase Petty - 2-0.21▲9 · 3-0 ball called strike
Pedro Ramírez vs Rhett Lowder - 3+0.19▲9 · 2-0 strike called ball
Pedro Ramírez vs Rhett Lowder
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.
- 1Eugenio Suárez — ump said strike, robot ruled strike: upheld.
- 2Tyler Stephenson — ump said strike, robot ruled ball: overturned.
- 3Carson Kelly — ump said strike, robot ruled ball: overturned.
- 4Sal Stewart — ump said strike, robot ruled strike: upheld.
Our tracked-rulebook zone matched the ABS ruling on 2 of 4 — a zone-definition gap (ABS grades a standardized, height-based zone), not our error.