The Oakland Raiders have improved their defense, except where it is most needed

The Oakland Raiders have continued their offseason makeover with the addition of DeAngelo Hall at cornerback. They have already added safety Gibril Wilson and defensive tackle William Joseph. The additions of Wilson and Hall will upgrade the Raiders' secondary into a unit that has the potential to be an elite unit. The problem is that other than the signing of Joseph, who looks to be depth at best, the Raiders have not addressed their need at defensive line.