What happened: The Chicago Cubs signaled the start of play with a game-day post ahead of first pitch. It marks the opener of a two-game schedule on the day.

Why it matters: Doubleheaders compress the calendar and stress pitching depth, putting a premium on bullpen management across back-to-back contests. How the Cubs script their staff in the opener often shapes the options available for the nightcap.

What to watch: Watch how the Cubs allocate their rotation and relief arms across both games of the doubleheader.