The House approved it, so when will the US legalize marijuana? - Poynter
Mets give mixed reviews of new PitchCom device for pitch signals
Rays tuned in to new electronic pitch-calling technology
Mattress Mack first pitch canceled: MLB CRO says Mattress Firm wasn't involved in decision
What is PitchCom in baseball? Explaining the device used by Shohei Ohtani, other MLB pitchers & how it works
Royals like PitchCom electronic pitch-calling device
MLB approves use of electronic pitch calling - Chicago Sun-Times
Rays tuned in to new electronic pitch-calling technology
Astros use PitchCom to transmit signs for first time
PitchCom device in MLB has roots back to 1962 minor leagues
After just four months, PitchCom is already reshaping MLB
Franklin MLB Electronic Youth Pitching Machine
MLB: Johan Santana pitches Mets' first no-hitter