MLB Umpire Bios
MLB Umpire Microphones in Action as 2022 Season Nears - Crew Chief
Hernandez, who sued MLB, among All-Star umpires
Confident umpires can improve baseball's pace issues
MLB umpire job responsibilities
Jamie Samuelsen: Bad umps like Hernandez should be held more
MLB, Official Information, Umpires
If you aren't a white male, YER OUT of luck as an umpire - Global
Adam Hamari - Wikipedia
The MLB Umpires Association is a flawed and opaque organization
Robot Umpires Could Be Coming to MLB as Soon as 2024 - CNET
Ten MLB Umpires Set To Retire Ahead Of The 2023 Season
MLB umpires may get on-field microphones to explain replay review
become MLB Umpire: How to become an MLB Umpire: Comprehensive