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Vanderbilt used an electronic wristband system for calling pitches
Game Day Signals - Electronic Pitch Calling for Baseball and Softball
Game Day Signals - Electronic Pitch Calling for Baseball and Softball
Use of one-way electronic devices approved in college baseball
Never Miss A Sign Wristband Sign System for Baseball and Softball — Never Miss a Sign
Wristband Signs - Own The Zone Sports
Wristband - Armilla Tech - Electronic Play Calling Technology
Never Miss A Sign Wristband Sign System for Baseball and Softball — Never Miss a Sign
Game Day Signals - Electronic Pitch Calling for Baseball and Softball
College baseball goes high-tech to send pitch calls to mound
Wristband Signs - Own The Zone Sports
Vanderbilt baseball debuts wearable 'pitch-signaling' devices to cut down sign-stealing, improve pace of play
High School Baseball: Wristbands more common as way to deliver signals