MLB will allow teams to use PitchCom, the anti-sign-stealing device, in 2022 season - The Athletic
MLB: Teams allowed to use PitchCom to limit sign stealing
Report: MLB to allow electronic pitch-signaling devices to deter sign- stealing
New MLB rules explainer: Pitch clock, shift ban, bigger bases - Sports Illustrated
How do catchers relay signals to pitchers? How does PitchCom work? - AS USA
MLB gives OK to electronic pitch calling
College baseball goes high-tech to send pitch calls to mound
MLB's PitchCom device could end sign-stealing in baseball
MLB to allow pitchers, catchers to use anti-sign-stealing technology during regular season - ESPN
MLB Approves PitchCom to Limit Sign Stealing - The New York Times
MLB game time drops 24 minutes to 2:40 with pitch clock. Players steal most bases since 1987
MLB news: Teams testing audio system to prevent sign stealing - Sports Illustrated
Houston Astros sign stealing scandal - Wikipedia
MLB to allow electronic pitch-signaling devices in 2022 season to prevent sign-stealing
Astros cheat, lawyers prosper and fans strike out in sign-stealing scandal