Dan Gavitt, the NCAA’s senior vice president of basketball, said officials are mulling the specifics of a Tournament bubble, including testing protocols, costs and the option of using fill-in teams if a squad has to be quarantined due to a positive test.Dan Gavitt, the NCAA’s senior vice president of basketball, said officials are mulling the specifics of a Tournament bubble, including testing protocols, costs and the option of using fill-in teams if a squad has to be quarantined due to a positive test.