The Facts: As Cook approaches the start of free agency, the Lions and Bills are showing the most interest, sources tell NFL Network's Mike Garafolo.

Diehards Line: A highly productive postseason by Cook, who had a team-high-tying 18 receptions for 229 yards and two touchdowns in three games, should warrant a return to the Packers. But clearly there will be other bidders. Remember, the Packers made the eight-year pro their only notable acquisition last offseason, and Cook delivered after a six-game absence because of an ankle injury early in the season. ... Stay tuned.