Well there is a PG named McCallum who some have talked about on here, so yeah, the correct spelling of a name is needed and isn't that hard.
McDermott is a super unathletic PF who is too small to play the position in the NBA. He is too unathletic to guard 3's. If Derrick Williams can't be a 3, why would McDermott? His only chance of having an impact in the NBA is as a stretch 4, but like I said, he is probably too small to do that well enough.
I guess if your definition for "swing for the fence" is by hoping an already developed player is able to completely overcome a severe disadvantage, then yeah. Really there are no "swing for the fence" picks in the 2nd round, because it's the 2nd round.