It could both be Bryce Brown and Fred.
We all love us some Fredex, but the position has evolved within the past 10 years favoring youth over age. Due to make over 2 mil, Fred could be a casualty for opening up space for resigning of Dareus and Gilmore.
If Fred is cut, I can see him be offered an option somewhere within the organization, possibly business side of game day operations or a team liaison.
We also have Connor and Felton at FB, not sure if they keep two.
Overall, it will be interesting to see what happens. Boobie was a great addition to ST last season. Karlos Williams may also be a key figure on ST. One question is Thigpen. Thigpen was picked up late last season. He did a great job on ST, but was listed as a WR. In Miami he was RB/TE listed. Don't know the rules, but we also have a log jam at WR. Do they switch Thigpen to RB?