Five storylines towatch

Manning's last ride? Future Hall of Fame quarterback Peyton Manning has given no public indication that Super Bowl 50 will be the final game of his NFL career, but it makes sense to think it probably will, especially if his Broncos win.

Manning, who turns 40 in March, is one of the best signal callers in NFL history by most statistical measures and is the league's only five-time Most Valuable Player.

Already a Super Bowl champion, perhaps the only criticism of Manning is his postseason record since he owns the record for most playoff losses with 13, including two in the title game.