DeShawn Shead

Anybody have the 411 on this guy? Is he worth taking a look at in free agency or just a waste of time?
Anyone else in free agency at the CB, SS or FS positions that we should take a realistic look at. No pipe dreams, just Steelers reality I'm talking about. You know what that means, no high priced flashy guys that the Steelers will never sign. Realistic guys that the Steelers would take a serious look at and maybe sign if the money and fit is right.