https://www.usatoday.com/story/spor...-calls-balls-and-strikes-pro-game/1702431001/ Here's how the new balls and strikes technology works: An official in the press box monitors a laptop running the TrackMan radar system that electronically determines balls and strikes. That information is immediately relayed to the umpire using a wireless earpiece. The pitches are tracked through a large Doppler radar screen high above home plate. The radar system measures a player's height and creates a strike zone. No doubt, the change will take a while for pitchers and hitters to adjust. The umpire wears an ear piece to hear the call determined by the TrackMan radar system, July 10, 2019. Atkins seemed unsure about it after throwing his one inning on Wednesday. He said it will take a while to adjust to getting high and low strikes called in his favor. Same for a truer but tighter strike zone on inside and outside pitches. He also noticed a delay in balls and strikes calls that fans may have not.