The biggest storyline of free agency, one that will send ripples throughout the rest of the 2012 offseason, is the fate of Peyton Manning, who could be released by the Indianapolis Colts, the franchise that Manning quarterbacked to a Super Bowl title in 2006. Manning, who turns 36 later this month, has reportedly undergone four medical procedures on his neck since he last played in an NFL game back in the 2010 season. View the full article