 Parí gbólóhùn yìí: Armstrong lọ sí Yunifásítì Florida ní Gainesville, Florida, níbi tó ti ń sáré fún ikọ eré ìdárayá Florida Gators nínú ìdíje NCAA. Ọkan ninu awọn ifihan iṣafihan iṣafihan agbaye akọkọ rẹ wa ni 2005 Central American ati Caribbean Championships: o gba ami fadaka 200 mita lẹhin Usain Bolt o si ṣe iranlọwọ fun ẹgbẹ Trinidad ati Tobago si ami wura ni 4 x 100 mita relay. O de ipele kẹrin-kẹrin ninu 200 mita ni 2005 World Championships in Athletics ati pe o jẹ kẹfa ni : 2005 IAAF World Athletics Final. Àwọn ojúewé wọnyí jápọ mọ: 