NFL free agency is set to begin on March 12, bringing pivotal decisions for the Detroit Lions regarding their eight biggest free agents. Carlton Davis, coming off a solid season with two interceptions and a notable performance, is expected to attract significant interest, making his return uncertain. Meanwhile, offensive guard Kevin Zeitler's success with a high run-blocking grade suggests the Lions will prioritize his re-signing as he may face less competition on the market.

Levi Onwuzurike is likely to stay, as he emerged as a valuable asset in his third season. Conversely, linebacker Derrick Barnes, who has struggled to establish consistency, may benefit from a fresh start elsewhere. Ifeatu Melifonwu, who showed promise in the previous season, is anticipated to find a new home after battling injuries. Finally, Tim Patrick's reliable production suggests he will likely stay with Detroit, along with fan-favorite Dan Skipper. However, edge rusher Marcus Davenport is expected to depart after underwhelming performances.