First of all, that's not "all the blacks" (you forgot Dexter Jackson, Johnnie Jackson, and the recently-signed Richard Jones and Zinjun Croon).
Besides, why would you drop the former Mr. Olympia and 202 Olympia champions?
They would never drop a former Mr Olympia. Dexter Jackson definitely won't be dropped as having 2 Mr Olympias on the payroll is good for business. Because Dexter is now a former Mr Olympia, he's pretty much set for life.
On the other hand the 202 title doesn't mean jack squat so Dave may be in trouble but because he in the military, it prob won't happen as he brings in the military market.
The way contract signing works is that they only sign athletes that can bring a certain market or has a large fan base.