[6][2] In the winter of 1979, Ohlsson drew attention from international clubs and signed for Arminia Bielefeld, recently promoted to the Bundesliga.
[2] Under manager Otto Rehhagel, he made nine appearances in the second half of the 1978–79 season and scored his only league goal in a 2–3 away defeat at FC Kaiserslautern.
[7] In 1980, Ohlsson returned to his former club Hammarby IF and immediately became the top scorer in Allsvenskan with 19 goals in 26 games, as the side finished 6th in the table, their best result in ten years.
In the finals against IFK Göteborg, Hammarby won 2–1 in the first leg away, but lost 1–3 in the home game at Söderstadion to a record crowd, missing out on the gold medal.
[13][14] Ohlsson retired from professional football in at the end of 1986, but continued to play for other local clubs in the lower Swedish divisions for a few more years.
Being responsible for the sport organisation, Ohlsson was criticised by supporters of the club after making the decision not to renew manager Sören Cratz's contract, that was due to expire at the end of the year, even though Hammarby was placed first and the league and later won the first ever Swedish Champions title in its history.