Wilmington Blue Rocks | 2,001 followers on LinkedIn. High-A Affiliate of the Washington Nationals | The oldest professional sports franchise in all of Delaware, the Wilmington Blue Rocks are widely regarded as one of the east coast’s premier Minor League Baseball franchises and an award-winning source of affordable, family themed entertainment in the First State. Each year, nearly 300,000 fans walk through the gates of gorgeous Frawley Stadium to cheer on the baseball stars of tomorrow - nearly 200 of whom have made it from Wilmington to the majors. From fireworks after every Friday home game to taking the field with the players or playing catch with family in the outfield, there’s no shortage of ways the Blue Rocks etch their place in the memory banks of their loyal fans.