The Seahawks agreed Sunday with Matt Flynn on a three-year deal, bringing one of the most wanted -- yet unproven -- free agents to Seattle. ESPN.com reported the deal is worth up to $24 million.

Flynn was a career backup in Green Bay, stuck behind All-Pro Aaron Rodgers -- much the way Matt Hasselbeck was stuck behind Brett Favre before being acquired by Seattle in 2001.

When given an opportunity, Flynn has shined. His best performance was his last, throwing for 480 yards and six touchdowns in a victory over Detroit in the season finale. That sealed Flynn as one of the top free-agent prospects this offseason. After visits to Seattle and Miami, he picked the Seahawks.

Alex Smith visits Dolphins. Free-agent quarterback Alex Smith left the Dolphins' complex after a 51/2-hour meeting Sunday. Team officials declined to comment on any details.

The visit could affect the Peyton Manning sweepstakes, because the 49ers are among three finalists for the four-time MVP, along with the Broncos and Titans.

The 49ers had been working to re-sign Smith but also went to North Carolina on Tuesday to watch Manning work out at Duke. Smith enjoyed his best season in 2011 under first-year 49ers coach Jim Harbaugh, a former NFL quarterback.

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