|Full name||Γιάννης Ανδριανόπουλος|
|Date of birth||1900|
|Place of birth||Piraeus, Greece|
|Date of death||6 November 1952|
|Playing position||Attacking Midfielder, Second Striker|
|1915–1918||Peiraikos Syndesmos FC|
|1918–1923||Peiraikos Syndesmos FC|
|1924||Athletic and Football Club of Piraeus|
|1924–1925||Olympiacos Omilos Filathlon Peiraia|
|* Senior club appearances and goals counted for the domestic league only.
† Appearances (Goals).
Born in Piraeus, Greece, Yiannis began his career at the age of 18, playing for home town club Peiraikos Syndesmos FC. Here Yiannis earned his first taste of success, winning an unofficial Greek Championship in 1923. Peiraikos Syndesmos FC merged with Peiraiki Enosis FC in January 1924 and the Athletic and Football Club of Piraeus was formed.Yiannis was part of the new team and helped them win the 1924 Athens-Piraeus championship.
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 FC; 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 FC.
Following a series of mergers between other Piraeus and Athens based clubs, as well as an Athens football Championship, Yiannis and his brothers went on to create Olympiacos FC in March 1925.Yiannis, Giorgios, Dinos and Vasilis, Leonidas went on to make the newly formed Piraeus Club famous throughout Greece. He had also two other brothers Aristides and Stelios Andrianopoulos were they playing in other Peiraias football clubs.
Yiannis was the oldest of seven brothers who like him, would go on to become famous footballers in the Olympiacos' ranks.As a result, Yiannis and his brothers earned Olympiacos the name Thrylos meaning "Legend" in Greek, a nickname which the club carries to this day. 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
- Olympic Football Tournament Final 
- President of Olympiacos (1929–1932)
- President of E.P.S.P & Hellenic Football Federation