Blue Notes · Umpire Grade2026-04-28
DET @ ATL
Home plate: Alan Porter
“Pitchers earned every strike the hard way.”
Umpire Grade
90.1% accurate
Run Favor
runs, DET
ABS Overturns
of 5 reviewed
What this shows — how Alan Porter called the 141 pitches that were taken (no swing), graded against the tracked rulebook strike zone. He got 127 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
- 1-0.30▲8 · 3-1 ball called strike
Kevin McGonigle vs Tyler Kinley - 2+0.28▲8 · 1-2 strike called ball
Riley Greene vs Tyler Kinley - 3+0.20▲8 · 2-1 strike called ball· challenged ✓
Kevin McGonigle vs Tyler Kinley
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
5 pitches went to the robots · 2 overturned (ump overruled) · 3 upheld (ump confirmed). This is Hawkeye ground truth, no model involved.
- 1Dillon Dingler — ump said ball, robot ruled strike: overturned.
- 2Dominic Smith — ump said strike, robot ruled strike: upheld.
- 3Austin Riley — ump said strike, robot ruled strike: upheld.
- 4Kevin McGonigle — ump said ball, robot ruled strike: overturned.
- 5Riley Greene — ump said strike, robot ruled strike: upheld.
Our tracked-rulebook zone matched the ABS ruling on 4 of 5 — a zone-definition gap (ABS grades a standardized, height-based zone), not our error.