I know that the popular opinion is to dump both of them, but this team cannot improve if they continue to make holes that they have to fill via the draft or FA. Witness Antoine Williams, Pat Williams, London Fletcher, Jason Peters, ad nauseum.
At some point you have to keep your average players and put better players around them. Whitner is not an All-Pro, but is still useful. Poz is useless in coverage, but is good in run defense . . .
If you want to turn around the franchise and actually win more than 4-6-7 games, you have to keep some talent and raise the overall talent level on the field.