At this point in the season, sifting through the free-agent market isn't going to produce much. The players who are still out there on their couches are there for a reason.
But one potential target at a position of need could help the San Francisco 49ers immediately.
That player would be linebacker Kwon Alexander.
The familiar face could have a positive impact for that very reason: he's already familiar with Robert Saleh's defense. The 31-year-old veteran has already done two tours under Saleh, and the familiarity with the scheme would help him hit the ground running quicker than the average free agent signed in mid-November.