Baseball umpires aren't blind. They just have trouble breathing, study of balls and strikes shows

Why do MLB umpires sometimes point instead of making a fist when calling a strike? - Quora

MLBONFOX] The Dodgers take the lead in the 8th after Ryne Stanek is called for a balk : r/baseball

It's a Really Weird Time to Be an Umpire - The New York Times

Baseball umpires aren't blind. They just have trouble breathing, study of balls and strikes shows

Brush with greatness: Bobby Valentine

Why can't you argue balls and strikes in baseball? - Quora

Observations – UmpireBible – The Blog

How can the MLB fix the poor ball and strike calls by home plate umpires? - Quora

Full Count by David Cone

Do umpires actually look at the plate at the same time they are watching the ball as they are calling balls and strikes or do they just use the catcher's position to

What do baseball umpires say when a strike/ball is thrown? - Quora