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There's 1 roster spot currently open as of right now.
@PleaseMakeABowlGame referenced it yesterday in the Recruiting thread (above), but the only one that would probably make sense at this point would be Quinn Costello, considering he went to the same high school as Morillo. He would be an awesome piece to have for the future but I don't know where he would fit into our already loaded frontcourt, and I don't think that kid is coming to college to sit on the bench.
Otherwise I'm not sure there is anyone else that fits well schematically; small guards don't fit the current scheme (Cadeau, Cason, who would both be expecting a starting spot or near it) and IMO we have no use for another upperclassman big. I think the only reason you would bring in someone like Brandon McCoy is if there have been serious unexpected issues that have come to light after the first week of practice with the existing 2/3 guys we have.