Just over half the ball/strike challenges were successful on the first day of spring training games Friday as Major League Baseball prepared for the first regular-season use of the automated ball-strike system — the so-called robot umpires.

Royals media relations director Nick Kappel posts it on social media every spring, early in the morning on the first day of baseball’s return: Beginning Friday with their Cactus League opener, the Roy

The outfield and starting rotation will be main focus for Astros in Grapefruit League games.