MLB approves use of electronic device to relay signs to pitchers

Here are all the rule changes, roster limits, safety measures, more in MLB's 101-page manual

What's a creative way to steal and relay signs in a baseball game? - Quora

Tom Glavine calls out Astros sign-stealing critics: 'Everybody's trying to find an edge' : r/baseball

Use of one-way electronic devices approved in college baseball

MLB sign stealing: History of allegations before Astros, Red Sox scandal - Sports Illustrated

PitchCom device in MLB has roots back to 1962 minor leagues

A brief history of video and technology in baseball, and how it helped teams steal signs - The Boston Globe

Report: MLB to allow electronic pitch-signaling devices to deter sign -stealing

MLB is turning to an electronic pitch-calling system to fight cheating

MLB approves use of electronic pitch calling - Chicago Sun-Times

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