I have zero idea who it is, not even a guess.
But I can throw out a theory with random speculation.
For arguments sake, let's pretend Yurcich and Pruitt worked it out. Out of his "loyalty" for Gundy giving him his shot, Yurcich doesn't want to derail Gundy's class.
Pruitt knows that we're not in on the same recruits, doesn't help a rival in anyway. Agrees to sign after ESD. Not that big of a deal.
Not suggesting in any way that is the case but it's no less speculation than hiding the Friend hire from supposedly mad recruits.