If the 49ers coaching staff believes Nnamdi can add something to the teams secondary, then I have to believe that they are right.  With teams passing the ball more and more, defenses need a deep and experienced secondary to cover multiple receiver formations.  The 49er secondary is far from settled, and if the price is right, Nnamdi's size and experience would be a welcome addition.  But I must stress, "If The Price Is Right".  I would not sink a ton of money into him.