[KC Chiefs.com] The NFL officially announced its 2012 preseason schedule today. The Chiefs will open the preseason at home against the Arizona Cardinals. The Chiefs second preseason game will be the 2012 installment of the Governor’s Cup when the Chiefs travel to St. Louis to take on the Rams. The Chiefs will head back home for game three of the preseason to take on the Seattle Seahawks and wrap up their preseason schedule with a trip to Lambeau Field to face the Green Bay Packers.