Do AL and NL MLB umpires wear a patch on their hats for their league? - Quora

Can an MLB umpire really tell where the ball crosses the plate without taking into account where the catcher's glove is when he catches it? - Quora

I'm a new umpire. What do I need to know about umpire equipment/uniform? - Quora

Do AL and NL MLB umpires wear a patch on their hats for their league? - Quora

Umpire Substance Checks Put Pitchers in Awkward Positions - The New York Times

What do MLB umpires do in the off-season? - Quora

When did MLB baserunners start wearing a special glove (looks like a mitt) on one hand? - Quora

Besides designated-hitting, what are the main differences between National League and American League pitching? - Quora

Do AL and NL MLB umpires wear a patch on their hats for their league? - Quora

Do MLB players get new hats every game? - Quora

How do baseball players view professional umpires? Do they see them as professionals dedicated to upholding the rules of the sport, or as biased, non-athletic observers? - Quora

What Umpire Gear & Apparel Minor League Baseball Umpires Wear, Blog

Can an MLB umpire really tell where the ball crosses the plate without taking into account where the catcher's glove is when he catches it? - Quora