He was part of the famed Lille team of the late 1940s.
Born in Germany, he made three appearances for the France national team.
Born in Gladbeck, Westphalia, Germany, Jadrejak moved to France with his family when he was two years old.
In the 1969–70 season, Jadrejak rejoined Lille as a manager, succeeding Daniel Langrand.
This biographical article related to association football in France, about a defender born in the 1910s, is a stub.