Blue Notes · Umpire Grade2026-04-19
NYM @ CHC
Home plate: Adam Hamari
“Reliable as a Tuesday: no complaints, no headlines.”
Umpire Grade
92.4% accurate
Run Favor
runs, NYM
ABS Overturns
of 3 reviewed
What this shows — how Adam Hamari called the 157 pitches that were taken (no swing), graded against the tracked rulebook strike zone. He got 145 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▲1 · 2-2 strike called ball
Bo Bichette vs Javier Assad - 2+0.23▲8 · 0-2 strike called ball
Francisco Alvarez vs Riley Martin - 3-0.19▼7 · 2-0 ball called strike
Dansby Swanson vs Luke Weaver
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
3 pitches went to the robots · 2 overturned (ump overruled) · 1 upheld (ump confirmed). This is Hawkeye ground truth, no model involved.
- 1Moisés Ballesteros — ump said strike, robot ruled strike: upheld.
- 2Luis Torrens — ump said strike, robot ruled ball: overturned.
- 3Mark Vientos — ump said ball, robot ruled strike: overturned.
Our tracked-rulebook zone matched the ABS ruling on 3 of 3 — a zone-definition gap (ABS grades a standardized, height-based zone), not our error.