Umpire (baseball) - Wikipedia
The Average Yearly Income for Major League Umpires
MLB notes: Umpires wear white wristbands to protest 'abusive player behavior' - Los Angeles Times
Hallion, Tom - Umpire Ejection Fantasy League Portal
They Call 'Em Like They See 'Em - Twinkie Town
Beyond the Strike Zone: Exploring the Vital Role of Umpires in a Game - Ump Junk - Officials Gear
Meet Pat Hoberg, Field of Dreams game umpire and Iowa native
MLB: Umpire Hernandez blew calls, losing World Series job
Don't Ignore The Signs! How To Become An MLB Umpire.
Gibson makes final call: MLB umpire retires after 24-year career, Sports
MLB makes history with umpire crew chief appointments - Los Angeles Times
MLB umpire job responsibilities
Heads Up - Umpire's Role Relative to Baseball's Unwritten Rules
MLB umpire Malachi Moore a trailblazer from Compton Youth Academy
How Umpires Work