MLB will test robot umpires at 13 spring training ballparks in 2025
A transmitter and receiver on the belt of Home Plate Umpire Brian Walsh that enables him to hear the electronic notifications as to weather a pitch was a ball or a strike by the ABS system during a AAA minor league baseball game between the Memphis Redbirds and Lehigh Valley IronPigs at Coca-Cola Park on May 9, 2023 in Allentown, Pennsylvania.