A source told ESPN's Rob Demovsky that Cook is not returning to the Packers.
"It's not an impasse. It's not posturing. It's 100 percent done," the source said.
Cook appeared to confirm that, tweeting Friday night:
A lot of misinformation out there..I definitely did NOT turn down a deal...but one thing I can say for certain...— Jared Cook (@JaredCook89) March 11, 2017
Thank you packers fans for such a epic experience. Had a great year, played w/some great teammates. Thanks for the support! You are amazing!— Jared Cook (@JaredCook89) March 11, 2017
Cook is expected to visit other teams, the source told Schefter.
Cook, 29, signed a one-year, $2.75 million contract with the Packers last March after he was released following three seasons with the Los Angeles Rams. He spent the first four years of his career with the Tennessee Titans.
He was a key component to the Packers' midseason turnaround last season from 4-6 to the NFC title game, which prompted quarterback Aaron Rodgers to say Cook "needs to be near the top of the priority list [to re-sign], the way he played this year."
Last season was Cook's first on a playoff team, and he called it "the most fun" he has ever had in his eight-year career, during which he has caught 303 passes for 3,880 yards and 17 touchdowns.
Although he missed six games because of an ankle injury, he averaged 12.6 yards per catch and had three touchdowns in 13 games, including the playoffs. His biggest play of the season was the sideline catch with 3 seconds remaining to set up the winning field goal against the Dallas Cowboys in the NFC divisional playoff game.
ESPN's Rob Demovsky contributed to this report.