Mario Williams is done...possibly from the NFL entirely. If the rumors of Dion Jordan having "issues" is true he's done as well.
Jelani Jenkins - 50/50 just because the Dolphins have a tendency to hold on to players too long
Koa Misi - 50/50 see Jenkins
Earl Mitchell - 40% chance he's cut. He lost his biggest backer in Vance Joseph but the bigger problem is we lack depth at DT with an inconsistent Phillips, Suh and that's it.
We really don't have many guys signed for next year on defense.
DE - Cameron Wake, Terrence Fede, Dion Jordan, Mario Williams
DT - Ndamukong Suh, Earl Mitchell, Jordan Phillips
LB - Kiko Alonso (RFA), Mike Hull, Koa Misi, Trevor Reilly, Neville Hewitt
S - Reshad Jones, Isa Abdul-Quddus, Walt Aikens, A.J. Hendy
CB - Byron Maxwell, Xavien Howard, Tony Lippett, Bobby McCain, Jordan Lucas
Those are the guys (not including future contracts of camp fodder) under contract for next year on defense. Not exactly a stellar looking defense on paper. Actually looks more like an expansion team on paper.