 In select games for the 2009 season, the Chiefs, as well as the other founding teams of the American Football League, wore "throwback" uniforms to celebrate the AFL's 50th anniversary.For the first time in team history, the Chiefs wore their red jersey with red pants forming an all red combo in their home opener against the Dallas Cowboys on September 15, 2013.Their all red uniforms are now an official uniform combination and has been used multiple times since.