Complex sentence: In 1989 he became a midfield player with Unterhaching from Bavaria League in the 2 Soccer-Bundesliga and completed the season 1989/90 (26 games) with 1 goal for his club.
Split into simpler sentences: In 1989 he became a midfield player with Unterhaching from Bavaria League in the 2. Fußball-Bundesliga and completed the season 1989--90 (26 games) with one goal for his club.