ÖSK managed to keep most of its squad for the first season in Superettan, except for keeper John Alvbåge who left for Viborg, and Patrick Walker who had previously been with the club returned as head coach. It was widely expected that the club would quickly return to the top flight in particular after an inspired pre-season. The home crowd also had big expectations, and in fact booed the team despite a 3–0 win against Bodens IF in the first game of the season. That turned out to be the last win for a while. After a terrible spring ÖSK was for a while struggling against relegation. A better autumn secured a fifth spot, but ÖSK were nowhere near promotion. 2006 started off with impressive wins, but the club lost their goal scoring ability in the mid-season. Bosnian Nedim Halilović was brought on from NK Varteks, a signing that proved crucial. Halilović's goal scoring form in the autumn of 2006 brought the club back to the top and after a nerve-wrecking final day of the season where Örebro beat Assyriska FF 2–1 at the same time as Brommapojkarna lost to Trelleborgs FF, the club was back in Allsvenskan. The win of Assyriska also marked the end of an era. Veteran Thomas Andersson, who had to leave the pitch because of a bleeding injury, made his last performance for the club. After this event, Andersson will forever be remembered as Captain Blood by the club's fans.