The Facts: Calvin Johnson has told people that 2015 would be his final season in the NFL, sources told ESPN, which would leave a massive hole for the Lions at receiver. Replacing one of the greatest receivers in NFL history is not going to be easy or done by one player, but here are several options between free agency, the draft and the current roster who could be part of the mix. According to ESPN.com's Michael Rothstein, Jeffery would be at the top of the list.

Diehards Line: While conceding that Jeffery would seem like a long shot, especially since the Bears could use the franchise tag or sign him to an extension before he reaches free agency, Rothstein notes that if Jeffery does reach the market, the Lions likely would at least pursue the 6-3 receiver hitting his prime. Jeffery struggled with injuries in 2015, but in four seasons he has 252 catches for 3,728 yards and 24 touchdowns. In nine games last season, he had 54 catches for 807 yards and four touchdowns. He would be the closest experienced replica to a deep, game-changing threat the Lions could get. It's just unlikely he'll be available. Other possibilities? Bengals UFA-to-be Marvin Jones and incoming rookies Laquon Treadwell and Will Fuller are next on Rothstein's list. Beyond that, Mohamed Sanu, Travis Benjamin, James Jones, and Jermaine Kearse are other free agents that will be available in March.