MLB notes: Umpires wear white wristbands to protest 'abusive
How Umpires Work
4 Man Umpire Mechanics
MLB umpire job responsibilities
The Role Of An Umpire - Athletics Nation
Heads Up - Umpire's Role Relative to Baseball's Unwritten Rules
An Inside Look at Umpiring: Talking to Brent Rice from the
Baseball Umpires Don't Get Overtime. Does That Affect Extra
MLB umpire Joe West has never missed a call. Just ask him - ESPN
The Umpire Strikes Back - WSJ
Gay umpire Dale Scott's autobiography comes out a winner - Outsports
Are MLB umpires ruining the sport of baseball? - Quora
A New Study Shows Umpire Discrimination Against Non-White Players
Umpire: What Is It? and How to Become One?