Home plate umpire Brian deBrauwere looks on while wearing an earpiece connected to a ball and strikes calling system prior to the start of the Atlantic League All-Star minor league baseball game, Wednesday, July 10, 2019, in York, Pa. deBrauwere wore the earpiece connected to an iPhone in his ball bag which relayed ball and strike calls upon receiving it from a TrackMan computer system that uses Doppler radar. The independent Atlantic League became the first American professional baseball league to let the computer call balls and strikes during the all star game. (AP Photo/Julio Cortez)