He made a brief return to form in 2006 when qualifying to play in the PDC World Darts Championship.
Spiolek's best form came in the late 1980s, when he reached the semi-finals of the 1987 Winmau World Masters, losing to Bob Anderson.
In 1988, Spiolek reached the final of the prestigious News of the World Darts Championship, losing to Mike Gregory.
He reached the final of the North American Cup in 1996, and the quarter-finals of the World Matchplay in 1997, but then gradually faded from the scene.
He had continued to play in the domestic Pro Tour events on the PDC circuit during 2005 and 2006 – playing in more than 10 events on the PDC Pro Tour, but he has remained inactive on the circuit since the Players Championship in Gibraltar in January 2007.