He passed from all the divisions of the infrastructure departments of the club, when in 1974, at the age of 17 he was promoted to the men's team, which was a result of his great and rapid development.
He started playing as a striker, then as a central defender, but established himself as an attacking midfielder, where he distinguished himself for his high technique and great creative abilities as well as for the dynamism of his game.
[3] In the season 1979–80, he played in all six UEFA Cup matches, where his team reached the Round of 16, eliminating Benfica and Perugia, only to be eliminated from Saint-Étienne[4] He also played in the games against Ipswich the following season, where Aris were beaten 5–1 at Portman Road and won by 3–1 at Kaftanzoglio Stadium.
[12] He played for the last time with the national team on April 29, 1981, in Greece's away defeat by Yugoslavia for the 1982 FIFA World Cup qualifiers.
[13] On 9 February 1988, at the eve of the rematch of AEK–Olympiacos for the cup, Ballis visited at the hotel where the AEK squad were located with a bouquet for the goalkeeper, Theologis Papadopoulos and created strong suspicions that he was trying to bribe him on behalf of Olympiacos to have reduced performance.