Cincinnati Reds manager Terry Francona says he’s told players not to use the experimental Automated Ball-Strike System in spring training. Francona told The Athletic he’s OK with younger players challenging calls via the ABS, which has been in use in the minors. But he figures there’s little point for veterans since the system won’t be in effect in the majors during this coming regular season. The computerized system is being tested during major league spring training exhibition games after four years of experiments in the minors. Starting last year, MLB focused testing on a challenge system in which the human umpire makes each original call.