KANSAS CITY, MO - JANUARY 6: Quarterback Alex Smith #11 of the Kansas City Chiefs calls out instructions at the line during the first half of the game against the Tennessee Titans at Arrowhead Stadium on January 6, 2018 in Kansas City, Missouri. (Photo by Peter G. Aiken/Getty Images)
The official numbers will change as the preseason completes and active rosters are submitted, but as things stand right now in terms of 90-man rosters around the National Football League, the K.C. Chiefs are currently sitting comfortably in the middle of the pack when it comes to calculating the average age of players under contract.