Royals rookie Jac Caglianone debuted to great fanfare on Tuesday. He took an 0 for 5, but still hit the ball hard a few times. Wednesday's schedule game in St. Louis was postponed due to weather, moving things to a doubleheader on Thursday.

Kansas City Royals right fielder Jac Caglianone settles in a second base after hitting a double for his first hit in Major League Baseball on Thursday, June 5, 2025 against the Cardinals at Busch Stadium in St. Louis. Jeff Curry Imagn Images

Royals rookie outfielder Jac Caglianone got a pair of firsts out of the way with one swing of the bat Thursday, but the Royals could go on to fall 6-5 in the first game of a doubleheader Thursday.