|Full name||Balázs Attila Megyeri|
|Date of birth||31 March 1990|
|Place of birth||Budapest, Hungary|
|Height||1.88 m (6 ft 2 in)|
|* Senior club appearances and goals counted for the domestic league only and correct as of 23 March 2014.
† Appearances (Goals).
In June 2010, he signed a three-year contract with Olympiacos.
He took part in the international match "8th Match Against Poverty", in 14 December 2010, in G. Karaiskakis Stadium in Greece, as the Olympiacos All Star team's goalkeeper.
He made his debut in a match against Kavala F.C. in a 3–1 win for Olympiacos in G. Karaiskakis Stadium. His first year in Piraeus was successful, having 3 good appearances as the third goalkeeper. Both the team and the fans claim that Olympiacos can count on Balazs for the future.
When Antonis Nikopolidis retired, and Urko Pardo left the team, Franco Costanzo was signed as the new first-choice goalkeeper, with Megyeri behind him, but due to his bad appearances, Megyeri started in goal for all of Olympiacos's matches the rest of that season, having a lot of clean sheets during the 2011–12 season.
He continued to start in goal consistently despite the acquisition of Roy Carroll, however he lost his starting place to Carroll in 2012–13, where he did start two UEFA Champions League matches. From January 2013 onwards, Megyeri returned to the starting 11.
In the new season he also have to fight for his position in the starting XI, with his new teammate, Roberto.
- As of 23 March 2014
On 16 May 2012, he was called up by Sándor Egervári to the Hungarian national team in a friendly match against Czech Republic. He didn't make an appearance in the match however as he was a reserve goalkeeper and still to this day, he has not made his International debut for his country. He has represented Hungary at Under 21's level.
- Olympiacos F.C.
- Nándor Hidegkuti Prize: 2009–10
- "FIFA U-20 World Cup Egypt 2009 – List of Players" (PDF). Fédération Internationale de Football Association (FIFA). p. 11. Retrieved 26 July 2013.
- "Ανακοίνωση" (in Greek). Olympiacos F.C. 15 June 2010. Retrieved 15 June 2010.
- Ferencvarosi Torna Club Official Website
- Erwischt! Hertha testet neuen Keeper
- "Aνακοίνωσε Μέγερι ο Ολυμπιακός" (in Greek). Contra.gr. 15 June 2010. Archived from the original on 18 June 2010. Retrieved 15 June 2010.