How much of a need linebacker was going to be for the Raiders next season was wholly dependent upon whether Denzel Perryman was re-signed. Well, recent reports say he and the Raiders were unable to come to a deal on his return, which means he is headed for the free agent market.
That means the Raiders either see an upgrade in free agency, or will look to the draft. The draft is far from a sure thing and with a great many other needs, and there may very not be an instant impact linebacker on the board from them.
Their best bet would be to try and lure a free agent in to step in at the position immediately. And there are a few decent options out there to choose from who could do just that.