Challenge System” during a Cactus League matchup between the Chicago Cubs and Los Angeles Dodgers. Employing ABS — referred to by some as “robot umps” — is an innovative step for baseball. MLB is testing the technology at 13 spring training ballparks across Arizona and Florida — including KC’s spring home at Surprise Stadium — in coming weeks.

Pitchers are always ahead of hitters to begin spring training. It’s easier for pitchers to prepare for facing hitters — traditionally throwing bullpens throughout January — than it is for hitters to get their timing down during batting practice in the winter.