Did umpires in any major team ever get the baseballs from a ground pop up dispenser?

The Evolution of the Baseball From the Dead-Ball Era Through Today, News, Scores, Highlights, Stats, and Rumors

How many baseballs is the home team required to have on hand at any one ball game? - Quora

As They See 'Em by Bruce Weber - Ebook

Umpire's Equipment Buying Guide

Baseball Fans In New York State Outraged Over Anthem Controversy

Major League Baseball considers dramatic change with robot umpires - CBS News

Bulldog Single-Wheel Baseball/Softball Combo Pitch : Baseball Pitching Training Aids : Sports & Outdoors

How many baseballs do Major League umpires rub up before games? - Quora

Old Time Family Baseball — A Brief History of Robotic Umpires

Umpire's Ejection of Three Blind Mice Deejay Was Historically Correct Call, News, Scores, Highlights, Stats, and Rumors

A's go down rabbit hole to retrieve a new mascot

Pete Alonso's Injury Highlights Risk of Hit-by-Pitch as Strategy - The New York Times