Career
He is 2.01 m (6 ft 7 in) tall. He plays at the power forward position. Slaftsakis played youth basketball with Halkidona and Mantoulidis, before he started his pro career.
Slaftsakis began his professional career with the Greek League club KAOD, during the 2012-2013 season.
Slaftsakis played at the 2010 International Basketball Federation Europe Under-16 Championship, the 2012 International Basketball Federation Europe Under-18 Championship, the 2013 International Basketball Federation Europe Under-20 Championship and the 2014 International Basketball Federation Europe Under-20 Championship with the junior national teams of Greece.