The reason it is so high is to deter the 7 point teaser players I am sure. Not that a -9 will do that, but it takes a flukey 1 point win out of the equation I guess. I think people find it easier to lay -1 than +15. But who knows Seattle hasn't had a lot of run this year, so not getting a lot of respect by most either.
IMO they win by DD, it is one thing to stop an ofense that can't score, it is another to stp one that can.
Wash did beat Seaa in week 4, so that is something theyhave going for them. But it was in Washington, in OT, and Seatle hadn't found themselves, as they were 2-2 after that game.