Major League Baseball has introduced several new rules in recent seasons, but perhaps the most significant one is being tested during Spring Training this year.

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.

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.

John Feinstein, the best-selling author who wrote “Where Nobody Knows Your Name” – an intimate look inside the minor leagues ...