Pedzisa mutsara unotevera: Muna 1976, Kardong akareba 6'3 " akapedza ari wechitatu muUnited States Olympic Trials yakaitwa muEugene, Oregon nenguva ya2:13:54. Muchirimo ichocho, muMontreal, Kardong akapedza ari wechina pedyo mumakwikwi evarume
mumarathon paMitambo yeOlympic yeZhizha ya1976, masekondi matatu bedzi shure kwomukundi wendarira. Muna 1998, nharo dzakamuka pamusoro pokushandiswa kwe steroid nevatambi veEast Germany mu1976 Summer Olympics, kusanganisira Gold medalist Waldemar Cierpinski. Kudai menduru dzaizogoverwazve kuvatambi vasina kushandisa zvinodhaka chete, muAmerica Frank Shorter ndiye aizotora menduru yegoridhe; achiteverwa nomunhu akahwina menduru yesirivha Karel Lismont wokuBelgium uye akahwina menduru yendarira Don Kardong weTeam USA.