 The Truman Sports Complex was the first example of multiple stadiums being built for specific sports at the same time.The designers, Kivett and Myers, were then absorbed by Kansas City architecture firm Hellmuth, Obata, and Kassabaum to become HOK Sport + Venue + Event (now the independent firm Populous), which went on to design many professional sports venues in the United States.Though hailed as revolutionary at the time, the Truman Sports Complex model of stadium design was widely ignored for the next 20 years, though the influence of both Arrowhead and Kauffman Stadiums were easily seen in venues such as Giants Stadium.