Free Agency Needs

The two most pressing needs appear to be 1) LB (with Rocky McIntosh's injury) and 2) CB (due to Carlos Rogers' injury). Warrick Holdman appears available and would provide veteran, if slow, reinforcement. Is Junior Seau also available?

I'm not sure what happened with David Macklin last year and why he didn't really play. Wasn't he a starting corner at some point? How can he not even get on the field?

Youth along both OL and DL would be nice too.