In 1991 a new league system was introduced. In the new 10-team league, the club finished runners up (second to IFK Göteborg only on goal difference) but dropped to third in the "Mästerskapsserien" between the top six teams. The strong results of ÖSK were very much thanks to new striker Miroslaw Kubisztal, signed from GKS Katowice in Poland. "Miro" or "Kuba" soon became a big home crowd favourite, and still today the ÖSK fans are called "Kubanerna" as a tribute to the Pole.