BALTIMORE � The UMBC volleyball team rallied from two sets down to force a decisive fifth set, but Delaware held on to the defeat the Retrievers, Friday afternoon at Loyola (Md.) University's Reitz Arena on the opening day of the Radisson Cross Keys Greyhound Challenge. The Blue Hens defeated the Retrievers, 3-2, in five sets (25-17, 25-19, 17-25, 29-31, 15-12).