|Olympic medal record|
|Men's Water Polo|
|1952 Helsinki||Team competition|
|1956 Melbourne||Team competition|
|1948 London||Team competition|
|1960 Rome||Team competition|
Jeney was part of the Hungarian team which won the silver medal in the 1948 tournament. He played two matches as goalkeeper.
Four years later he was a member of the Hungarian team which won the gold medal in the 1952 Olympic tournament. He played six matches as goalkeeper.
At the 1956 Games he won again the gold medal with the Hungarian team. He played two matches as goalkeeper.
His last Olympic tournament was in Rome 1960 where he won the bronze medal. Again he played two matches as goalkeeper for the Hungarian team.
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