BALTIMORE � UMBC freshman Sherelle Walker (New Freedom, Pa./Susquehannock) notched her first two career double-digit kill performances and recorded a total of 45 kills in the tournament as the Retrievers swept tournament host Morgan State, 3-0 (25-16, 25-12, 25-11), but fell to St. John's, 3-1 (25-20, 29-27, 23-25, 25-14), Saturday at the Battle at the Bay at Hill Field House.