Vikings retain backup quarterback Sage Rosenfels

FOX Sports’ Alex Marvez reports that the Vikings have agreed to terms with quarterback Sage Rosenfels, whose contract expired at season’s end. Details of the deal are unknown. Rosenfels, 34, projects as the team’s third-stringer behind Christian Ponder and Joe Webb. Rosenfels has appeared in 44 career games, making 12 starts. His career record is…