Pari gbolohun yii: Spiridonov bẹrẹ iṣẹ rẹ pẹlu CSKA Moscow ti o nṣire ni ẹgbẹ keji wọn. O lọ si ere hockey junior fun awọn Smiths Falls Bears ni Canadian Junior Hockey League ati awọn London Knights ti Ontario Hockey League ṣaaju ki o to ṣe akojọpọ nipasẹ Edmonton Oilers, 241st gbogbo, ni
Ọdún 1998. Spiridonov lo awọn akoko mẹta ti o tẹle ni ṣiṣere ni awọn liigi kekere, ti o baamu fun Grand Rapids Griffins, Springfield Falcons, Tallahassee Tiger Sharks ati Hamilton Bulldogs. Kò lè gbá bọ́ọ̀lù nínú ẹ̀ka NHL, nígbà tí ó sì di ọdún 2001, Spiridonov padà sí Rọ́ṣíà.