Career
Born in Piraeus, Greece, Yiannis began his career at the age of 18, playing for home town club Peiraikos Syndesmos Football Club. Here Yiannis earned his first taste of success, winning an unofficial Greek Championship in 1923. The same year around autumn, the new club split in two different squads: One team, led by the Andrianopoulos brothers and goalkeeper Kostas Klidouchakis, formed Olympiakos Omilos, which evolved into Olympiakos Football Club. The other, led by Kostas Ferlemis, Christos Peppas and Giorgos Hadjiandreou merged, with an independent club named "Young Boys" to form Peiraikos Omilos, which in turn evolved into Ethnikos Peiraios Football Club. Two other brothers, Aristides and Stelios Andrianopoulos, were playing in other Piraeus football clubs.
Yiannis was the oldest of seven brothers who, like him, would go on to become famous football players in the Olympiacos" ranks. Yiannis was certainly the brother who made the biggest impact towards the club, even becoming a player-coach.
Olympiacos" first coach, from 1925 until 1927.
In 1929, Yiannis retired from football, and became Olympiacos" president for 3 years. Olympiacos First Manager.