Some of the clubs that Kalaitzidis has played with during his pro career include:
Iraklis Thessaloniki,
Olympiacos,
Panellinios,
APOEL. In the summer of 2012 Kalaitzidis signed for Greek Basket League Team
KAOD. He joined
Kavala in the summer of 2013. On 23 July 2016, Kalaitzidis signed a contract with Iraklis Thessaloniki of the
Greek A2, returning in the team after 11 years. On 23 September 2020, he signed with
Aris Thessaloniki of the
Greek Basket League. On 26 July 2021, Kalaitzidis signed with Gefyra, opting for the first time in his career to play in the
3rd division. ==National team career==