 With the arrival of Marcelo Zalayeta and Ezequiel Lavezzi, he had limited chances to play.In July 2008, Calaiò joined fellow Serie A team, Siena in a co-ownership bid, for €2.3 million.in June 2009 Siena signed him outright for €1.25 million (which made Napoli register a financial loss of €1.05 million).