Whakaotihia te rerenga e whai ake nei: I te tau 1976, ko te 6'3 "Kardong i mutu i te tuatoru o nga United States Olympic Trials i whakahaerehia i Eugene, Oregon me te wa o te 2:13:54. I taua raumati, i Montreal, i mutu a Kardong i te tuawhā tata i te whakataetae tāne
marathon i te 1976 Summer Olympics, e toru hēkona anake i muri i te toa mētara parahi. I te tau 1998, i puta he tautohetohe mo te whakamahinga o te steroid e nga kaitakaro o Tiamana ki te Rawhiti i te 1976 Summer Olympics, tae atu ki te toa koura Waldemar Cierpinski. Mēnā ka whakawhiwhia anō ngā mētara ki ngā kaitākaro kore-tarukino, ka riro i a Frank Shorter o Amerika te mētara koura; ka whai ake ko te mētara hiriwa a Karel Lismont o Belgium me te mētara parahi a Don Kardong mō Team USA.