Peyton Manning calling it a career after 18 NFL seasons (Yahoo Sports)

Peyton Manning's days of decoding defenses and recuperating in cold tubs are over. The five-time MVP is retiring after 18 NFL seasons, dozens of passing records, five MVP trophies and two Super Bowl championships. A month after basking in the glow of his second Lombardi Trophy and a parade through downtown Denver attended by more than a million fans, the soon-to-be 40-year-old quarterback called one last audible and told Broncos boss John Elway he's retiring.