When healthy, he is a big-rangy safety with better speed than people realize. However, he did just return from a major injury last year.
Williams suffered an ACL injury in November of '04 and didn't seem to have the same range last year. His coverage was a liability for Tennessee last year, and that likely has really hurt his value.
However, he is less than 18-months removed from the surgery and is only 26, so he may still be worth a look. His situation just means teams are going to wait until their immediate needs are addressed before looking at him.