Seattle's CB depth

With smart drafting and player development, the Seattle Seahawks have been able to establish one of the league's best secondaries, and obviously part of that is a strong group of CBs. There's no question about the pecking order up top, as Brandon Browner and Richard Sherman occupy the two outside starting spots, with Antoine Winfield and Walter Thurmond in the mix as the extra backs in nickel and dime packages. But who's in the mix beyond that group?