Let the fun begin.
The legal negotiating window for 2025 NFL free agency opened Monday at noon ET. Teams, including the Detroit Lions , can speak with agents of pending free agents from other teams and agree to deals. Those agreements can become official Wednesday at 4 p.m. at the start the new league year.
The Lions enter the week top 10 in effective cap space at around $50 million . That was before they Lions re-signed linebacker Derrick Barnes to a three-year contract on Friday and edge rusher Marcus Davenport on Saturday. They also saved $5.75 million in cap room by releasing edge rusher Za'Darius Smith .
ANALYSIS: Ranking Lions needs and identifying potential targets in NFL free agency
The Lions are in Year 5 of the regime led by general manager Brad Holmes and head coach Dan Campbell. They have big needs at both defensive tackle and edge rusher, as well as outside cornerback, guard and No. 3 receiver. Read our analysis of needs with potential targets .
Here are the latest updates that Lions fans need to know from Monday's NFL free agency negotiating window opening.
Lions and NFL free agency updates 2025
Khalil Mack contract: Star DE returning to Chargers
Cross another big-name defensive lineman off the wish list for Lions fans.
Mack, a nine-time Pro Bowler edge rusher, reportedly agreed to a one-year, $18 million contract to play the 2025 season with the Chargers once again. The news came about an hour before the legal negotiating window was set to open at noon ET. Mack is 34 years old.
Mack joins Myles Garrett ( re-signed with Cleveland Browns ) and Harold Landry (signing with New England Patriots ) as top edge rushers off the market.
Stay tuned for the best Lions coverage all year long at freep.com/sports/lions .
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This article originally appeared on Detroit Free Press: Lions free agency live updates moves: Rumors, news, what to know
