At 6'4" (1.93 m) in height, he played at the power forward and center positions.

Stamelos started his club playing career with the junior teams of Sporting Athens in 1964.

With Sporting, he was the Greek League Top Scorer in the 1977–78 season.

In the top-tier level amateur Greek Championship (1963–1992), he played in 361 games, and scored a total of 6,645 points, which was the 8th most total points scored in the competition.

[1] Stamelos played in 53 games with the senior men's Greek national team.