An Electronic Umpire? Baseball Tried It (In the 1950s!) - The New York Times
Mattel Baseball
Amazon.com: Electronic Retro Sports Game Assortment: Baseball Electronic Games : Toys & Games
Handheld Baseball - Etsy
Handheld video game:Mattel Electronics Baseball - Mattel, Inc. — Google Arts & Culture
MLB looking at electronic system for calling pitches | AP News
Cimarron Sports : Best prices on Hack Attack eHack Electronic Baseball Pitching Machine
File:Sears Offense-Defense Electronic Baseball, Model No. 49-65094, Made In Taiwan, Copyright 1980 (Electronic Handheld Game).jpg - Wikimedia Commons
Baseball by Micro Electronics - Old School Gamer Magazine
Coleco Head to Head Baseball
Vintage Tudor Tru Action Electric Baseball Game 1963 Electronic | eBay
/pic131289.jpg "Electric Baseball | Board Game | BoardGameGeek")
Electric Baseball | Board Game | BoardGameGeek
File:Electronic Baseball by Entex Industries, Model -8001, Red LED, Made in Taiwan, Copyright 1979 (LED Handheld Electronic Game).jpg - Wikimedia Commons
Electronic Baseball - Discontinued
Handheld video game:Coleco Head to Head Electronic Baseball - Coleco — Google Arts & Culture
Sign of times: MLB gives OK to electronic pitch calling
ENTEX ELECTRONICS 1979 HANDHELD ELECTRONIC BASEBALL GAME | eBay
PitchCom Extends to High School Baseball After MLB Success
/cdn.vox-cdn.com/uploads/chorus_asset/file/20045027/tiger_electronics_baseball_game.jpg "Remembering 1989 All-Stars via Tiger Electronics handheld game - Athletics Nation")
Remembering 1989 All-Stars via Tiger Electronics handheld game - Athletics Nation
Amazon.com: Mattel Classic Baseball Game : Toys & Games
Vanderbilt used an electronic wristband system for calling pitches
Electronic Baseball Ticket Electronic Invite Birthday DIY | Bobotemp
