Just like the last 5+ years, in the end there will be attrition and we'll start the year at 80 or less. If you look around the country, there's an average number of players that leave/quit/transfer/medical hardship, etc. Then when you tack on a coaching change the numbers are ALWAYS higher.
Remember, Mullen said that the jig is up w/ the S&C program. Some of these players may have gotten used to the soft program the previous staff ran (or whatever the issue was) and may not like how they get treated (or may not like what is expected of them). There will be some washout from the current roster.
In addition, there are several of these kids who should have never been signed by an SEC school....much less a UF type school. These kids could be "advised" to seek a transfer (i.e. they'll be told they can stay, but they very likely won't see the field). Basically, they'll get Saban'd out of the program.
Bottom line, expect several more departures. I expect to open the year w/ no more than 80 true scholarship players (not counting the 4-6 or so walk-ons that get the leftover scholarships).