Panthers re-signed DT Dwan Edwards.

Edwards turns 32 in May, but showed in 2012 that he has gas left in the tank. His six sacks were the most by a Panthers defensive tackle in a decade. Edwards' return gives some credibility to a Carolina interior line that is annually among the NFL's worst. They need to continue to add talent in April's draft.

There has been no movement in negotiations between the Panthers and free agent DT Dwan Edwards.

The Panthers made Edwards a one-year, $1.5 million offer last week. He says he has a two-year deal on the table from another team and is inclined to take it if Carolina doesn't up the ante. Edwards, 32 in May, posted 6.5 sacks as a 4-3 tackle last season.

Now that the franchise tags have been handed out and the list of remaining free agents is clear, it's a fine time to see just what's available out there. Individual Defensive Player (IDP) owners will be waiting anxiously for players to ink new deals and settle into their new (or old) roles on NFL teams in order to begin draft preparations in earnest.

NFL teams continue to trim numbers off of their salary cap by restructuring contracts or releasing players in anticipation of going after the big fish on the market. Landing the perfect free agent fit for an NFL team is one thing and determining whether or not it is a fit for IDP fantasy purposes is another.

Here is a look at an 11-man defensive unit made up of some of the best possible IDP fantasy players that are unrestricted free agents.

For the purposes of this article we will assume (I know ... a very bad word) a 4-3-4 base defensive alignment. There may be a player or two listed that has yet to have his position set for the 2013 season as some outside linebacker/defensive end designations may be changing later in the summer.

DEFENSIVE TACKLES

Richard Seymour, Oakland: I'm torn on this guy for 2013 fantasy purposes as he was pretty productive in the eight games he played last season with 15 total tackles and three sacks. However, he is 33 years old and coming off a season in which he was shut down in December due to a hamstring injury.

That being said, he was playing very well up until suffering the injury and is perhaps the most talented defensive tackle left on the free agent market. Seymour isn't going to produce above-average tackle numbers at this stage of his career but he can still be a disruptive force from the interior of a defensive front.

A one or two year deal is the best Seymour can hope for in 2013 which will bring a ‘prove yourself' type of edge to his game and that could mean a very productive fantasy season, providing he is 100 percent recovered from the hamstring injury and can remain healthy for the majority of the year.

Dwan Edwards, Carolina: Edwards signed last September with the Panthers and had a productive fantasy campaign that saw him finish the season with 52 total tackles and a career best six sacks. In his previous seven seasons he had amassed a total of 5� 1/2 sacks while lining up for the Baltimore Ravens and Buffalo Bills.

He has averaged just more than 35 combined tackles a season for his career and added three forced fumbles and an interception. Those are very...