The 3-4 probably helped mask his lack of speed plus he was playing with a lot of top tier talent. With the Raiders that just was not the case.
I was hoping he could be some reasonable fascimile of P.Willis and was happy when the Raiders drafted him because they needed a leader. I guess not. Now they have to fill another hole.
They need to overhaul the interior of the defense and get a pass rusher. Maybe even move to a 3-4.