Chicago Cubs vs Arizona Diamondbacks is a Major League Baseball regular-season game played at Chase Field in downtown Phoenix. The matchup features the visiting Chicago Cubs against the host Arizona Diamondbacks during the MLB 2026 season. Chase Field, the Diamondbacks’ home ballpark with a retractable roof (and notable as one of the first U.S. stadiums built with a retractable roof over a natural-grass surface), provides a climate-controlled setting for the contest.