So, uhh....Richard Marshall, huh?
Here's where the San Diego Chargers are, currently. They need a starting Nose Tackle (probably, unless they absolutely love Lawrence Guy and Sean Lissemore) and a #1 CB, as well as a #2 WR (because even if Malcom Floyd comes back you can't guarantee he'll stay healthy). They also might need a FB, if they even want one.
Most of those issues will be handled in the draft. The team might even be done in free agency.
This has been your status report.