The latest installment of the Wilmington Blue Rocks “Mr. Celery” logo is now available at Hat Club. This New Era 59Fifty fitted features an all navy crown and visor. The Blue Rocks’ “Mr. Celery” mascot is embroidered on the front in a batting stance in team colors.. Pick up this hat and check out the rest of their New Era Custom Fitted selection at HatClub.com today.