A League source confirms that the Seahawks have agreed to terms with Tarvaris Jackson

The source of the League confirmed that the Seattle Seahawks have agreed to terms with free agent quarterbak Tarvaris Jackson, and that is expected on Friday to sign an agreement with the team.

Dave Mahler KJR 950 AM was first announced the deal on Twitter, a few moments after reports emerged that veteran Defender Matt Hasselbeck does not plan to re-sign with the Seahawks.

Unrestricted free agents can sign contracts with teams until Friday, but the period of negotiation between the teams and free agents begins at 7 p.m., Pacific time Tuesday.

John Clayton, ESPN reported last week that the Mets were interested in Jackson, who spent his first five seasons of his career in Minnesota. At that time, the Vikings offensive coordinator Darrell Bevell was that he was hired in January by coach Pete Carroll to fill Seahawks in the same position in Seattle.

Jackson Started with Bevell, probably played a key role in promoting an offer from Seattle. With a very limited window of time for players to learn new playbooks and new coaches, new system it can be for the benefit of the Seahawks ' starting quarterback who have at least a little familiar with Bevell.

Jackson is 10-10 in 20 career starts, sitting behind Brett Favre in Minnesota the last two seasons. Jackson started just six games since 2007 when he 12 games and threw for 1,911 yards with nine touchdowns and 12 interceptions.

EDIT: Should add that Jackson is in no way automatically Seattle starting quarterback from day one. He would obviously compete with Charlie Whitehurst on the job, and reports surfacing now the Seahawks have been in conversations with Matt Leinart to bring him to Seattle, also. So could conceivably enter the Seahawks training camp with a three-man quarterback competition, if reports about Leinart prove accurate.