Both clubs have agreed not to disclose the terms of the transfer - St. Pauli’s first ahead of the 2026/27 campaign.
>>> See all the Bundesliga deals already agreed for the summer
Australian midfielder Klein, who also holds Norwegian citizenship, initially played for Brisbane’s U21s after joining the club in January 2021. He enjoyed a short spell with the Gold Coast Knights in 2024 before returning to the Queensland capital in September that year.
