The Chargers are hard at work trying to put the finishing touches on their team to set them up for the best draft possible next month. They have 10 picks in all which is plenty of ammo to make moves throughout that weekend and/or potentially make a trade for someone currently on another roster.
If the Chargers are still looking to add available free agents, there are currently two on the market I think would be low-cost additions that would do nothing but raise the floor without forcing the Chargers into a pre-designed path through the draft and the rest of the offseason.