Chicago Bears

Key free agents: Tight end Kellen Davis, running back Matt Forte (franchise), cornerback Corey Graham, quarterback Caleb Hanie, defensive end Israel Idonije, cornerback Tim Jennings, quarterback Josh McCown, safety Brandon Meriweather and receiver Roy Williams.

Where they stand: The Bears will have the most salary-cap space among NFC North teams, upwards of $30 million, and have plenty of potential uses for it. Quarterback Jay Cutler needs more targets in the downfield passing game, whether it's at the receiver or tight end position. And new general manager Phil Emery must start restocking a defense led by four players more than 30 years old: Linebackers Brian Urlacher and Lance Briggs, defensive end Julius Peppers and cornerback Charles Tillman.

What to expect: It's widely believed the Bears will be in the running for free-agent receiver Vincent Jackson. But Jackson's price tag could be steep and no one knows if Emery will prove to be a big spender. It seems likely he will re-sign Davis, and Emery should also save some of his cap space to extend Forte's contract. Secondary receiver targets could include Marques Colston. Bears fans are hoping the team will pursue defensive end Mario Williams, but it's hard to imagine the Bears budgeting for Williams two years after breaking their bank on Peppers.

Detroit Lions

Key free agents: Defensive end Cliff Avril (franchise), left tackle Jeff Backus, safety Chris Harris, quarterback Shaun Hill, linebacker DeAndre Levy (restricted), running back Maurice Morris, running back Kevin Smith, quarterback Drew Stanton, linebacker Stephen Tulloch and cornerback Eric Wright.

Where they stand: The Lions are tight against the salary cap after franchising Avril and aren't likely to be big spenders on the free-agent market. They could relieve the situation by reaching long-term agreements with Avril and/or receiver Calvin Johnson, who has a $22 million cap figure for 2012. Tulloch made a big impact last season after signing a one-year deal, but so far the Lions' attention has turned elsewhere.

What to expect: The Lions' best-case scenario is to keep their 2011 core together without mortgaging their future relative to the salary cap. That would mean getting Tulloch re-signed to preserve the linebacker group they upgraded last season by signing him and veteran Justin Durant, moves that allowed Levy to play on the outside. Hill seems likely to re-sign as Matthew Stafford's backup, while Stanton might test the free-agent waters to see if he has a chance to do better than third on a team's depth chart.

Green Bay Packers

Key free agents: Cornerback Jarrett Bush, quarterback Matt Flynn, running back Ryan Grant and center Scott Wells.

Where they stand: The Packers took care of a big challenge by signing tight end Jermichael Finley to a two-year contract last month. They will let Flynn depart for a possible starting job elsewhere and it appears Grant will test the free-agent market. Discussions with Wells haven't led to an agreement, but the Packers often go to the final moments before reaching a deal. There are no obvious internal replacements for Wells, making his return a priority.

What to expect: The Packers will have some flexibility with the salary cap, but general manager Ted Thompson's aversion to veteran free agency is well known. It's been three years since he signed a veteran unrestricted free agent in the offseason. The Packers have needs at defensive line, outside linebacker and possibly at center if Wells leaves. But let's put it this way: Thompson's strong preference is to find depth and future replacements in the draft, not on other teams' rosters.

Minnesota Vikings

Key free agents: Safety Husain Abdullah, receiver Devin Aromashodu, receiver Greg Camarillo, defensive lineman Fred Evans, defensive lineman Letroy Guion, linebacker E.J. Henderson, linebacker Erin Henderson, safety Tyrell Johnson, quarterback Sage Rosenfels, cornerback Benny Sapp and tight end Visanthe Shiancoe.

Where they stand: The Vikings seem poised for a major roster overhaul in their first offseason since Rick Spielman was promoted to general manager. Players like Shiancoe, E.J. Henderson, Camarillo and Johnson all seem poised to move on. There aren't many positions on the team that appear secure.

What to expect: If the Vikings don't plan to draft USC left tackle Matt Kalil at No. 3 overall next month, the first clue will be if they pursue a free-agent left tackle. That seems unlikely. But they'll need to combine their draft with at least a few veteran free agents if they intend to compete for a playoff spot in 2012. Cornerback could be a point of focus, where Brandon Carr and Cortland Finnegan are among those available. Another could be receiver. The Vikings had major interest in Jackson two years ago.