Ain't much he can do about it really. I don't expect them to back up the Brinks truck....remember, its a "system"
I do expect a tender at a higher than minimum level, whatever that means when all this madness shakes out, but as far as a hold out, I don't see it, as he really doesn't have many bargaining chips.
Sucks for him, as he had a PHENOMENAL year, and probably deserves to be paid as such, but I don't see it happening this go around.
Found this thru a google search at
http://football.calsci.com/FreeAgency.html
Exclusive-Rights Free Agents (ERFA)
An Exclusive-Rights Free Agent is an NFL player who is not under contract, but has only two years of NFL experience. If his former club makes him an offer at the three year veteran minimum salary, then that's it, he has to take it or leave the NFL. These guys have no right to negotiate with other teams. They are "free" only in the sense that they're free to quit.