Uniform Standards - United Collegiate Umpires

In 1973, new fashion for baseball umpires was strictly a judgment call - The Boston Globe

Referee Necessities Bundle - Black & White Striped Referee Jersey, Umpire Hat, and Stainless Steel Ref Whistle with Lanyard - Men's, Unisex Amateur Sports Football Costume Apparel (Small) : Sports & Outdoors

The video of Terry Collins arguing with an umpire is perfect, but

Officials' Responsibilities & Positions

Umpire strikes back; Space Command colonel selected to officiate State of Colorado high school baseball finals > Air Force Space Command (Archived) > Article Display

For Volunteer Umpires, Little League World Series in the Pinnacle - The New York Times

After early exit, how do Braves approach '24?, Sports

College umpire suspended over called third strike in Mississippi Valley State-New Orleans game

United Umpires