Retirement an option for veteran Broncos?

We knew heading into the 2013 campaign that the Denver Broncos had a small window to accomplish their goal of winning a Super Bowl with Peyton Manning, since he is 37 years old. He's not the only aging veteran on the Broncos roster, either, with the likes of Champ Bailey (35) and Wes Welker (32) in the mix. Each of those players will tread past another birthday before next season kicks off.