Team Logo. The Wilmington Blue Rocks are a team in the Carolina League. They are the High-A affiliate of the Kansas City Royals. They get their name from the blue granite that is found along the Brandywine River. Retrieved from "https://prosportsteams.fandom.com/wiki/Wilmington_Blue_Rocks?oldid=7242" Categories: Carolina League teams Teams in Delaware Add category Cancel Save Community content is available under CC-BY-SA unless otherwise noted.