 Kọ itẹsiwaju fun paragirafi yii - Ni ọdun 2001, Lassiter gba miili naa ni Awọn Ajumọṣe Amẹrika Indoor Track and Field ati tẹle eyi nipa ipari kẹfa ni 2001 IAAF World Indoor Championships : ìlú Lisbon, lórílẹ-èdè Potogí. O si pari keji ni 1500 mita ni USATF Outdoor Championships ni ọdun kanna. O tun wa ni ipo  2 ni AMẸRIKA nipasẹ Track and Field News ni ipari akoko naa. 