Pros and cons of MLB's robo-ump experiment: How ABS system worked during spring training debut ABS will not be used in the majors this coming season, but it seems like only a matter of time ...

Back in May, commissioner Rob Manfred indicated the automated strike zone system -- ABS for automated balls-strikes -- would likely come to Major League Baseball in the form of a challenge system ...

The MLB will continue testing the ABS challenge system after an initial test run in spring training.

GOODYEAR, Ariz. — Cincinnati Reds manager Terry Francona says he’s told players not to use the experimental Automated Ball-Strike System in spring training.

Terry Francona explained why he's encouraging Reds players not to make any challenges using the ABS system, which MLB is testing during roughly half of spring training games this year.