The Truman Sports Complex was built and owned by the government of Jackson County and managed by the Jackson County Sports Complex Authority which is a state of Missouri agency. The current complex design, by Charles Deaton, was arrived at when Deaton caught the ear of Kansas City Chiefs General Manager Jack Steadman and suggested building side-by-side stadiums for the two sports with each stadium customized to its needs. The original plan called for separate side-by-side stadiums with a mutual rolling roof. However, the roof was never built due to cost. The complex was revolutionary in an age when new stadiums tended to be built as multiuse venues for planning and cost purposes.
Kansas City began a project to renovate both Arrowhead and Kauffman Stadiums in 2007 following the passage of a 3/8-cent sales tax increase in a referendum in 2006. Improvements to Kauffman Stadium were finished in time for MLB Opening Day 2009, and Arrowhead Stadium was completed in time for NFL Opening Day 2010. A separate tax referendum to raise funds to finally build the rolling roof failed. Both stadiums are being renovated by Populous.
With renovations both the Royals and Chiefs have leases on the stadiums through January 31, 2031. Their previous lease which was renegotiated in 1990 had been set to expire January 31, 2015.
Arrowhead Stadium, home of the National Football League's Kansas City Chiefs, opened in the fall of 1972. George Halas called Arrowhead "the most revolutionary, futuristic sports complex I have ever seen." Fans occasionally refer to the stadium as The Sea of Red or simply Arrowhead. The stadium is commonly referred to as the "Home of the CHIEFS" at the beginning of every home game. Arrowhead has long held a reputation for being one of, if not the, loudest outdoor stadium in the NFL due to the exuberance of the Chiefs' fans. On October 13, 2013 the Guinness Book of World Records certified Arrowhead with a world record for the loudest crowd roar when fan cheering reached 137.5 decibels in the Chiefs 24-7 over the Oakland Raiders, until December 2, 2013 when the 12th Man of Seattle's Centurylink Field broke the record with 137.8 decibels. 
Kauffman Stadium, home of Major League Baseball's Kansas City Royals, opened in spring 1973 as Royals Stadium and is located adjacent to Arrowhead. The stadium's name was changed in 1993 to honor Royals founder Ewing Kauffman just months before his death. Although the stadium is less than 40 years old, it is the sixth-oldest stadium in MLB, as a result of the construction of a number of new stadiums in the 1990s. It was the only baseball-specific stadium completed from the early 1960s until the early 1990s. (SeeList of Major League Baseball stadiums.)