WTFACTS Major League Baseball: Umpires are required to wear black underwear

MLB umpires wear wristbands to protest 'abusive' treatment

MLB umpires have an underwear requirement?! 😳😂⚾️ #mlb #baseball #mlb

Umpire 101: Uniform Basics

16 Unusual And Weird Sports Facts You Might Not Know - CBS Boston

Nfhs Baseball Rules in Black and White: Bettencourt, Jim: 9781681571522: : Books

New Umpires - What do you need to know about Umpire Equipment

Umpires to announce replay reviews to fans

MLB umpires wear wristbands to protest 'abusive' treatment

100 Crazy Sports Facts That Are Almost Unbelievable

What is the difference between umpires who wear black and white stripes and those who wear blue in Major League Baseball (MLB)? - Quora

New Umpires - What do you need to know about Umpire Equipment

MLB umpires have an underwear requirement?! 😳😂⚾️ #mlb #baseball #mlb