Home Plate Umpire Brian Walsh uses an earpiece to hear the electronic notification as to weather a pitch was a ball or a strike by the ABS system during a AAA minor league baseball game.

The automated ball-strike system (ABS) has been used for minor league games, but it's getting rolled out for the first time in the big leagues during spring training.

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MLB will be using robot umpires in spring training this year / Kiyoshi Mio-Imagn Images This year's MLB spring training could prove more consequential than any in years past as MLB will experiment ...