Why are Yankee games so fast this year? PitchCom may be the answer
How PitchCom changed the way MLB players communicate - Sports Illustrated
Sign of times: Major League Baseball gives OK to electronic pitch calling
Who generally calls the pitches in Major League Baseball - pitcher, catcher or manager? - Quora
MLB news: Teams testing audio system to prevent sign stealing - Sports Illustrated
No more sign stealing? Electronic pitch calling coming to big league ballparks - Federal Baseball
Wondering how PitchCom works? Check out HR's and Dan's demo in 42
MLB Allow Using Of PitchCom System To Combat Sign Stealing
What is PitchCom and how MLB will use it to stop sign-stealing
MLB approves use of electronic device to relay signs to pitchers in 2022