Jones, one of Carolina's early free-agent additions, was signed to a two-year, $15 million pact in March. He's coming off a career campaign—where he notched bests in combined tackles (39) and sacks (7.0) for the Minnesota Vikings.

Clowney could provide valuable depth for Seattle's offensive line, and he is familiar with Mike Macdonald's system.

Free-agent defensive end Jadeveon Clowney suspected that the Carolina Panthers didn't view him as part of the team's future before he was cut on Thursday.