A 22-year-old prospect is officially joining the Royals this week, a left-handed free swinger whose arrival in the bigs includes an online greeting from the most famous person in Kansas City. Jac Caglianone has been all the rage outside an organization that already features one of the five best players in baseball,

The Royals’ best prospect since Bobby Witt Jr. is on his way to the Major Leagues, as the club called up top prospect Jac Caglianone on Monday morning. It sets the stage for the slugging first baseman/outfielder’s big league debut on Tuesday in St.

KANSAS CITY, Mo. — The Kansas City Royals have called up top prospect Jac Caglianone in the hopes of jump-starting their languishing offense, and the slugging first baseman and outfielder is expected to make his major league debut in St. Louis.