The Seahawks traded the 104th (4th), 176th (6th) for the 111th (4th), 185th (6th), LenDale White and Kevin Vickerson.
You just take a shot on a guy who you know could not work out, because the resources involved aren't that big.
For the Seahawks, a team with absolutely no players on the D-line anymore, Kevin Vickerson is enough to make that trade worth it.