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

Terry Francona came out of a one-year retirement to take the managerial reins of the Cincinnati Reds this season.

Reds manager Terry Francona plans to opt out of elective participation in the automated ball-strike challenge trial during spring training but is willing to let Cincinnati's minor league players accustomed to the procedure use challenges.

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.

Reds manager Terry Francona plans to opt out of elective participation in the Automated Ball-Strike Challenge trial during spring training, but is willing to let Cincinnati's minor-league players accu