|Date of birth||January 6, 1973|
|Place of birth||Sofia, Bulgaria|
|Height||5 ft 10 in (1.78 m)|
|Playing position||Forward / Midfielder|
|1995||→ Chattanooga Railroaders (loan)||15||(18)|
|1996–1997||Admira Wacker Wien||29||(3)|
|* Senior club appearances and goals counted for the domestic league only.
Ilarionov began his career with PFC CSKA Sofia in Bulgaria. In 1995, he came to the United States for the summer, playing for the Chattanooga Railroaders in the 1995 USISL Professional League. In 1996, Ilarionov transferred to Admira Wacker Wien . During the 1997-1998, he is only shown as playing three games for SV Gerasdorf. In 1998, Ilarionov moved permanently to the United States, signing with the Nashville Metros in the USISL A-League. In 1999, he moved to the Charleston Battery for two seasons. In 2001, he played five games for the Atlanta Silverbacks. He returned to the Silverbacks for the 2004 and 2005 seasons.