You might remember him as the 49ers defender who returned a DeMarco Murray fumble for a touchdown on one of the first plays of the 2014 season. This past year was one of Culliver's first real opportunities to start, and he played well for the 49ers. San Francisco's myriad of free agency questions might result in a location change.
Kyle Terada-USA TODAY SportsKyle Terada
Bargain hunting. The Giants signed Brown off waivers after Baltimore released him this past season. He appeared in eight games for New York and made 31 tackles for a defense that looked better down the stretch than it did at the start of the year.
APPhelan M. Ebenhack
Another of Bryant's many victims. Much like the Cowboys' own Morris Claiborne, this first-round pick was benched for a stretch during 2014. He's been a disappointment in New Orleans, but he was talented enough to go 32nd overall in the draft.
Charles LeClaire-USA TODAY SportCharles LeClaire
This would draw quite the response from the Cowboys faithful, at the very least. Fletcher was an unreliable member of a bad Philadelphia secondary -- you probably remember him giving up three touchdowns to Dez Bryant in the same game. He's not likely to be expensive, though, and perhaps he'd improve if given a new scheme.
Tim Heitman-USA TODAY SportsTim Heitman
As is the case all over the Cowboys' roster, it wouldn't be a bad move to re-sign their own. Moore played capably in a variety of roles after Morris Claiborne's injury opened the door for more playing time. He played in all 16 games, and he started eight of them. His 14 passes defended led the team.
Jeff Hanisch-USA TODAY SportsJeff Hanisch
The least-heralded member of Seattle's Legion of Boom, Maxwell played admirably on the other side from Richard Sherman. With the money the Seahawks have invested in Sherman, Earl Thomas and Kam Chancellor -- not to mention the money they'll soon need to pay Russell Wilson -- it seems unlikely they'll be able to retain him. Given his performance on such a good team, though, he's bound to be an expensive signing.
Jim O'Connor-USA TODAY SportsJim O'Connor
An interesting dynamic, because Flowers teamed with Brandon Carr for several seasons in Kansas City. The Chiefs cut him in 2014, allowing him to sign a one-year deal in San Diego, where he was solid with 52 tackles and three interceptions.
Getty ImagesTom Szczerbowski
Formerly a member of the famous Seattle secondary, Thurmond signed with the Giants in 2014 but suffered a season-ending pectoral tear after just two weeks. He's talented, and his skill in the slot could allow Orlando Scandrick to move outside. It seems like a good bet New York will try to keep him, though.
Thomas J. Russo-USA TODAY SportsThomas J. Russo
The Cardinals thrived off the blitz in 2014, and a big reason why they were able to was Cromartie and Patrick Peterson locking down the outside of the field. Cromartie is coming off a Pro Bowl season, but he's also about to turn 31. He'll still command a good chunk of change, but he's a more affordable option than Revis.
Chris Humphreys-USA TODAY SportsChris Humphreys
Along with Ndamukong Suh, Greg Hardy and potentially Adrian Peterson, this is a name many Cowboys fans desperately ask about when it comes to free agents. There's no question he'd upgrade a mediocre Dallas secondary. There's also no question he'd be an incredibly hard player to acquire. The Patriots signed Revis to a $12 million deal last spring, and he did everything to prove he was worth it during a Super Bowl season. With the other issues the Cowboys have to address, Revis doesn't seem like a realistic signing.