Does anybody know where he played between July and December 1980?
He arrived to Chiasso on 15. December 1980. The Swiss press wrote that he came from Belgian Club Lierse.
I had a look in Peter's Book - No Siwek.
Was he still at Roda? Was he at Lierse without contract? Was he at Borussia Dortmund? Or didn't he have a club?
http://www.playerhistory.com/Default.as ... erID=15027

Two more questions on him:

- Did he receive German Citizenship when he escaped Poland?
- Does someone have stats regarding his early career at Polonia Bytom?

Thanks in Advance

A NAC Breda web-site states that he played his last game for them in May 1980. A Borussia Dortmund web-site states that he left them for NAC Breda. So it would seem that between Sept 80 and joining Chiasso he was either with another club or club-less.
Sorry I can't be of more help.

Siwek was on loan from Borussia when he was playing for NAC