I know this question has probably been asked multiple times but does anyone have a clear answer to how MSU has room to include trey zeigler in 2010?

From what I can tell from the schollie situation:

Seniors: lucas,allen,summers, herzog
Juniors: green, lucious, roe

Sophmores: Sherman, nix

Freshman: byrd, guana, appling, payne

Count them up and I see 13 scholarships. I have heard izzo say they are stilling looking to add one more and zeigler seems to have never said anything indicating a scholarship situation but the only way I see him coming to msu are by way of:
A) someone leaving for the NBA. lucas? summers? I doubt it.
B) Atrrition in the program. herzog graduating and not staying for a 5th year to ride the pine? maybe.

C) Trey come to MSU w/o a scholarship and pay for the first year of school before being put on scholarship after lucas/allen/summers/herzog are gone.

 Today I read an article saying he was "comfortable" with MSU and his top 7 schools (uofm,UCLA,Arizona,ASU,duke,MSU, CMU) are all even. Also, although I am sure this isnt exactly what he meant but when zeigler said how cool it would be to have another fab 5 in college (PG appling SG byrd SF zegiler PF Guana C Payne...hey I can dream can't I?) was there a chance MSU crossed his mind? I really hope he takes a visit to MSU and strongly considers going here but unless I am missing something, I do not see how MSU can get him w/o A,B or C coming true.