Mezue ahịrịokwu na-esonụ: N'afọ 1976, Kardong nke dị 6'3" bịara nke atọ na United States Olympic Trials nke e mere na Eugene, Oregon na oge nke 2:13:54. N'oge okpomọkụ ahụ, na Montreal, Kardong bịara nke anọ n'asọmpi ụmụ nwoke
marathon na 1976 Summer Olympics, nanị sekọnd atọ n'azụ onye meriri ọla nchara. Na 1998, esemokwu bilitere banyere iji steroid site n'aka ndị egwuregwu East German na 1976 Summer Olympics, gụnyere onye mmeri ọla edo Waldemar Cierpinski. Ọ bụrụ na e kenyeghachiri ndị na-eme egwuregwu na-anaghị eji ọgwụ ọjọọ eme ihe, onye America bụ́ Frank Shorter ga-enweta ọlaedo; onye na-esote ya bụ onye mmeri ọlaọcha Karel Lismont nke Belgium na onye mmeri ọla nchara Don Kardong maka Team USA.