If you look at the Oakland Raiders roster you see that that they have no pass rusher just look at there Defensive ends and defensive tackles.
Kamerion Wimbley OLB/DE: Kamerion a Wichita native is a 3-4 OLB who had 6.5 sacks in Cleavland 3-4. I don't think he will get more then 3-4 sacks in a 4-3 as a defensive ends. If he flops I would love for KC to sign or trade for him.
Matt Shaughnessy DE: Matt is a promising Defensive end but I think Callahan will easily shut him down on game day because he only had 4 sacks this year and had 1 at KC.
Jay Richardson DE: Jay is more of a 3-4 defensive end at 6-6 280 pounds. But, he had a good year in Oakland summing up 4 sacks, But, Richardson is not a premiere pass rusher and is more of a run stopper.
Richard Seymour DE/DT: Seymour is a 3-4 defensive who is lost in Oakland's 4-3. But, he still had 4 sacks last season, he is for of a run stopper than a pass rusher.
Tommy Kelly DT: Tommy is complete overrated Al gave him a 6 or 5 year deal worth 50 Million dollars. And he re payed Al with only 1 sack and 55 tackles.
There's a common denominator here there is no pass rush in Oakland, so I see Matt Cassel just trashing Oakland throwing for over 400 yards like he did in New England.