While playing for Aris Thessaloniki, Stack adopted the citizenship of the Republic of Macedonia, so he could play as a European, out of the two non-Europeans per team policy in the Greek League at that time.
While playing for Aris Thessaloniki, Stack adopted the citizenship of the Republic of Macedonia. That way he could play as a European on a bossman passport, and thus not count as one of the two non-Europeans per team policy in the Greek League at that time.