Quinn, who started eight games for the Chiefs last year, will be the backup for Russell Wilson in Seattle.
Quinn, who started eight games for the Chiefs last year, will be the backup for Russell Wilson in Seattle.
Dustin Bradford/Getty Images

Brady Quinn and the Seattle Seahawks have officially finalized their deal to make him the backup quarterback to starter Russell Wilson.

Quinn's deal was finalized on Thursday, but terms of the contract were not available. Quinn and the Seahawks agreed to terms of the contract earlier this week.

Quinn joins Josh Portis as the expected backups to Wilson. Quinn played last year for the Chiefs, starting eight games. It was his first regular-season playing time since the 2009 season.

Backup safety Chris Maragos also signed his one-year contract tender on Thursday. Maragos was a restricted free agent and a special teams standout for the Seahawks last season.

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