How many more years does peyton Manning have left in him?

I think this is the year that he starts declining. I don't even have the Colts in the playoffs this year, I only see them winning 9 games. Manning is going to start declining, and they won't have a running game to fall back on. Their running game isn't very good. Also, they don't have a good defense, I don't see them stopping good offensive teams. All they have is the passing game. They won't be in the playoffs. The Texans will. The Texans will win the division. They have the passing game, Shaub and Johnson, but they also have Foster who is a great RB, and they improved the defense, especially with drafting JJ Watt. Also, Asomugha would be a good fit, if they went after him, because then they would have a corner to for the most part take away the primary receiver. Asomugha basically fits good anywhere though, I could see him going to a whole bunch of different teams.