About this time of year when a National Football League team or two is unbeaten, talk centers on the chances for another perfect season.
It has been more than 40 years since the Miami Dolphins went 17-0 ending with a Super Bowl victory. No NFL team has duplicated the feat.
In 1972 the Dolphins won 14 regular season games, two playoff games and after a Super Bowl win they ended the season with 17 wins.
In 2013 the Kansas City Chiefs and the Denver Broncos are undefeated. They are definitely on a collision course as they are in the same division and are scheduled to play each other twice before the season ends. They will meet on November 17 and December 1.
In the photo above Knowshon Moreno of the Broncos carries the ball in a 2012 win against the Chiefs.