MLB gives OK to electronic pitch calling
No more sign stealing? Electronic pitch calling coming to big
MLB to allow pitchers to call own signals - Taipei Times
7 weeks into season, Astros singing praises of PitchCom
MLB Approves PitchCom to Limit Sign Stealing - The New York Times
Push-button pitching: MLB to let pitchers call own signals
Red Sox Notebook: Rich Hill finds a groove, but Tanner Houck used
Who's involved in calling pitches? Everyone, Tigers skipper says
Giants catchers, pitchers adjusting to fingerless signs with PitchCom
Pace of play - Wikipedia
PitchCom device in MLB has roots back to 1962 minor leagues
What is the New PitchCom Device and How Does it Work?
Big-league pitchers can use PitchCom for signals this year
Push-button pitching: MLB to let pitchers call own signals