First it was 3 CD's in Ohio that Santorum failed to file a list of delegates, and now it is
apparently 9 CD's (out of a total of 16 CD's), which if true means Rick is potentially out of the hunt for 18 delegates in Ohio.
Of further interest, per the article, it is unclear what will happen if Rick wins a CD where he has filed no slate of delegates. The 2 delegates assigned to that CD are apparently awarded to no one in that case, yet Ohio is still entitled to send the same number of delegates to the convention, so they will need to be chosen somehow, by some unspecified mechanism. So there will be a contretemps about that. One Rick will certainly win OH-06 where he has no delegates filed, so one can expect this issue to actual become in play.
The article does not list the 9 CD's Rick failed to file a slate in, so we don't know the identity of the additional 6 CD's where Rick dropped the ball.
Addendum: Green Papers says 3 delegates are awarded per Ohio CD rather than 2, by the way. So it may be 27 delegates in play here, rather than 18.