 Warren's big opportunity came on February 2006, when he moved to Croatia for traditional powerhouse KK Cibona and played there until the end of the 2007–08 championship.With Cibona he won back to back Croatian Championships and had two great EuroLeague seasons, averaging 13.7 and 15.6 points per game.In July 2008, he signed with Scandone Avellino of Italy for the 2008–09 season.