I'm sure it's possible 4 cb's could be taken, but that's not the same as saying there is no chance he's there at 22.
I like Scotts stuff, but he's wrong more than he's right when it comes to mocks, not that most people aren't. He has us taking Felix Jones and Mario Manningham in the first (the same as his last mock) despite both players hurting their stock at the combine, Mario isn't even considered a 1st round talent at this point.
http://www.nfldraftcountdown.com/archive/2007/mock.html
That's his final mock from last year, how many of those players in the first round actually ended up where he thought they would? Just one, JaMarcus Russel. Not exactly stellar for a supposed expert.
The same team that traded us their first so we could get a player to sack their QB? I don't think they're concerned about taking someone so we don't get him, no.
They have other needs anyway, and depite this "Sheldon Brown will be traded." talk, he'll still be there next year. They need a play making WR more than they need a CB right now.