Kammala wannan jumla: A 1973, gasar zakarun kasa da kasa ta ba da damar zuwa sabon gasar zakarun kasa da kasa ta IAAF. A cikin
1973, Amurkawa maza ba su shiga ba amma matan Amurka sun sami lambar tagulla ta tawagar. Mazan Amurka kuma ba su shiga gasar zakarun duniya ta 1974 ba, kodayake Amurka ta Junior Men ta shiga kuma ta lashe lambar zinare ta tawagar bayan nasarar da Rich Kimball ya samu a kan mai lambar yabo ta Olympics John Treacy. Mazan Amurka sun yanke shawarar ɗaukar Gasar Cin Kofin Duniya da gaske a 1975, suna gudanar da wani taron cancanta daban a watan Fabrairu. Matan Amurka ba su gudanar da tseren cancanta daban ba, sannan aka haɗu da maza, har zuwa 1998.