Seahawks sign Jason Jones

RENTON, Wash. -- The Seattle Seahawks have added needed depth on the defensive line by agreeing to terms with free agent defensive tackle Jason Jones.

The team confirmed the agreement Saturday. Jones' agent, Mike McCartney, said on Twitter the deal is for one-year and a league source told ESPN NFL Insider Adam Schefter the deal is worth $4.5 million fully guaranteed with an additional $500,000 in performance incentives.

Jones has spent his first four seasons with the Tennessee Titans where he had 15½ 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.

Information from The Associated Press contributed to this report.