Not necessarily. It could be a reserve big who's got some athletic upside playing at a lower level, who just wants to be a part of an NCAA squad that has the potential to make a run. Said player doesn't have to be a big scorer gunning for a starting role -- he ain't gonna get that here. Rebound, play defense, block some shots, work hard in practice, and be ready if we have injuries or your number gets called for some other unforeseen reason.
That's why I referred to Onganet above -- he came here never expecting to play, and was essentially brought in to be a practice body. Then we had some injuries, and he ended up playing.