"My family and I have been very pleased by the success the franchise has sustained over the last four seasons under coach Reid," Chiefs chairman and CEO Clark Hunt said in a statement. "He has already established himself as one of the best coaches in the league, and he is well on his way to solidifying a place among the all-time greats. We are proud to have him leading our football team, and I look forward to working with him to bring a championship to Chiefs Kingdom."