Something tells me that Bryce wasn't exactly thrilled with the direction the program was going in Knoxville. Direction meaning, it went from a pimp and ho's operation to one that might actually try and instill some integrity, work ethic, and accountability. Dooley and Kitten are polar opposites of one another, and I suspect Brown didn't want any part of it.
Having said that, it is interesting with the timing. There's a rumor on one of the Vols boards that Brown knocked up his girlfriend and they're planning on moving back home to be close to family. I'm not saying that is in any way true, but the timing of all of this is kind of odd. There may be more going on than just not being on the same page with the new staff.