Buuxi weedha soo socota: Ser-Od wuxuu bilaabay ka qeybqaadashada tartamada masaafada dheer 2002. Waxa uu kulankiisii ugu horeeyay ee ciyaaraha caalamiga ah ka ciyaaray
2002 IAAF World Half Marathon Championships wuxuuna kor uqaaday masaafada marathon-ka ee 2003 World Championships ee Athletics, halkaas oo uu ku soo baxay 63-aad oo leh waqti shaqsiyeed 2:26:39 saacadood. Wuxuu ahaa kii laba iyo tobnaad ee 2004 Hong Kong Marathon, kii seddexaad ee Aasiya ah ee ku dhammaystira garoonka Afrika. Sanadkaas ayuu sameeyay kulankiisii ugu horeeyay ee Olombikada ee 2004 ee Athens. Wuxuu ahaa mid ka mid ah laba reer Mongolia ah oo ku tartamay tartanka ciyaaraha fudud, oo ay weheliyaan haweenka marathon-ka Luvsanlkhündegiin Otgonbayar. Ser-Od wuxuu galay kaalinta 75aad guud ahaan waqtigii ahaa 2:33:24 saacadood, qiyaastii labaatan daqiiqo ayuu ka dambeeyay guuleystaha.