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Perhaps the most high-profile free agent in NFL history, Peyton Manning settled in Denver after a frenzied courtship that came down to the Broncos, Cardinals and Titans. The Broncos won a playoff game with Tim Tebow under center last year, but couldn't resist adding the legend. It's a bold move that, if it works, will put the Broncos in Super Bowl contention. But tha could be a big if, considering the neck injury that sidelined the 36-year-old for all of 2011.

Photo: Nam Y. Huh/AP

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