Blue Notes · Umpire Grade2026-04-13
CHC @ PHI
Home plate: Nate Tomlinson
“The strike zone picked a side, and wasn't shy about it.”
Umpire Grade
94.0% accurate
Run Favor
runs, PHI
ABS Overturns
of 2 reviewed
What this shows — how Nate Tomlinson called the 182 pitches that were taken (no swing), graded against the tracked rulebook strike zone. He got 171 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▼3 · 3-2 strike called ball· challenged
Brandon Marsh vs Javier Assad - 2-0.39▲1 · 2-2 ball called strike
Nico Hoerner vs Cristopher Sánchez - 3+0.30▼6 · 3-1 strike called ball
Bryce Harper vs Charlie Barnes
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
2 pitches went to the robots · 1 overturned (ump overruled) · 1 upheld (ump confirmed). This is Hawkeye ground truth, no model involved.
- 1Miguel Amaya — ump said ball, robot ruled ball: upheld.
- 2J.T. Realmuto — ump said strike, robot ruled ball: overturned.
Our tracked-rulebook zone matched the ABS ruling on 0 of 2 — a zone-definition gap (ABS grades a standardized, height-based zone), not our error.