The team confirmed the agreement Saturday. Terms of the deal were not announced, but Jones' agent, Mike McCartney, said on Twitter the deal is for one-year.
Jones has spent his first four seasons with the Tennessee Titans where he had 15 1/2 sacks. He was used as a defensive tackle and end last season, and his versatility fits with Seattle's defensive philosophy. The 6-foot-5, 276-pound Jones started 15 games in 2010 and 13 last season.