Blue Notes · Umpire Grade2026-04-17
BAL @ CLE
Home plate: Nate Tomlinson
“An honest evening's grade: nothing loud, nothing missed by much.”
Umpire Grade
96.5% accurate
Run Favor
runs, CLE
ABS Overturns
of 2 reviewed
What this shows — how Nate Tomlinson called the 171 pitches that were taken (no swing), graded against the tracked rulebook strike zone. He got 165 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
Kyle Manzardo vs Chris Bassitt - 2+0.13▼4 · 1-0 strike called ball
Bo Naylor vs Chris Bassitt - 3-0.13▲8 · 1-0 ball called strike
Taylor Ward vs Shawn Armstrong
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.
- 1Samuel Basallo — ump said ball, robot ruled ball: upheld.
- 2Leody Taveras — ump said ball, robot ruled strike: overturned.
Our tracked-rulebook zone matched the ABS ruling on 1 of 2 — a zone-definition gap (ABS grades a standardized, height-based zone), not our error.