The Cardinals have signed CB Ralph Brown, DE Rodney Bailey and DE Joe Tafoya.  Brown is the most likely of this bunch to contribute to the defense.  He played in all 16 games last season for the Cleveland Browns and he made 36 tackles and defensed 8 passes.  He will likely be the Cardinals nickel or dime corner this season.  DE Rodney Bailey played in 12 games last season for the Pittsburgh Steelers and he made 6 tackles and defensed a pass.  He will likely make the team as a reserve player.  DE Joe Tafoya played in 13 games last season for the Seattle Seahawks and he made 12 tackles, defensed a pass and recovered a fumble.  These were good depth signings by the Cardinals who are trying to rebuild their defense right now.