Marine Corps Mascot Relief and Appointment Ceremony BRoll. Video by Cpl. Lawrence Babilya, Marine Barracks Washington, 8th I, Date: BRoll of Sgt. Chesty XIII, outgoing Marine Corps mascot, retiring in a ceremony at Marine Barracks Washington, D. C., and has Lance Cpl. Chesty XIV, incoming mascot, taking his place, Aug. 28.