This developed quickly, teams have been experimenting with this during the spring and MLB just approved it for use this season:
"Pitchers and catchers will have the option of using newly tested signaling devices as they decide what pitches to throw to hitters in the upcoming regular season, industry sources tell ESPN.
This technology could help to advance Major League Baseball beyond the risk of the sign-stealing scandals that have plagued the sport in the last decade.
MLB is expected to give teams a go-ahead for players to deploy what is referred to within the industry as PitchCom. Using a pad with buttons on the wrist of the gloved hand, a catcher can signal pitches -- pitch type, and location -- with the suggested selection directly to the pitcher through a listening device.
Up to three teammates of the pitcher and catcher will also have access to the signals, aiding fielders in positioning.
Change in baseball is often slowed by tradition, but the first reviews of the PitchCom system this spring have been glowing, with players raving about how the electronic process of pitch-signaling has been seamless, helping with the flow of the pitchers' actions on the mound."
Luis Severino used it this weekend and loved it, he was hoping it was approved right away and now it has been:
https://www.espn.com/mlb/story/_/id/33674768/mlb-allow-pitchers-catchers-use-anti-sign-stealing-technology-regular-season-sources-say
"Pitchers and catchers will have the option of using newly tested signaling devices as they decide what pitches to throw to hitters in the upcoming regular season, industry sources tell ESPN.
This technology could help to advance Major League Baseball beyond the risk of the sign-stealing scandals that have plagued the sport in the last decade.
MLB is expected to give teams a go-ahead for players to deploy what is referred to within the industry as PitchCom. Using a pad with buttons on the wrist of the gloved hand, a catcher can signal pitches -- pitch type, and location -- with the suggested selection directly to the pitcher through a listening device.
Up to three teammates of the pitcher and catcher will also have access to the signals, aiding fielders in positioning.
Change in baseball is often slowed by tradition, but the first reviews of the PitchCom system this spring have been glowing, with players raving about how the electronic process of pitch-signaling has been seamless, helping with the flow of the pitchers' actions on the mound."
Luis Severino used it this weekend and loved it, he was hoping it was approved right away and now it has been:
https://www.espn.com/mlb/story/_/id/33674768/mlb-allow-pitchers-catchers-use-anti-sign-stealing-technology-regular-season-sources-say