How PitchCom changed the way MLB players communicate - Sports Illustrated
MLB to test pitcher-catcher transmitter with Ports, Nuts to combat cheating
Never Miss A Sign Wristband Sign System for Baseball and Softball — Never Miss a Sign
Marketing and Sponsorship: Big problem, tiny solution: PitchCom helps MLB make stealing pitch signals a sign of the past
Pitcher-catcher communication system tested in Minor Leagues
Wristbands For Pitchers? Some Colleges Embrace New Way To Call Games — College Baseball, MLB Draft, Prospects - Baseball America
Rays tuned in to new electronic pitch-calling technology
MLB unveils a technical fix for sign stealing
Report: MLB To Allow Use of 'PitchCom' in Regular Season To Prevent Sign Stealing - Sports Illustrated Texas Rangers News, Analysis and More
How do catchers relay signals to pitchers? How does PitchCom work? - AS USA
Everything you didn't know you need to know about MLB's new rules
MLB to test electronic device for catchers to give signals to pitchers - ESPN