Following individual wins in Berlin and Warsaw, Frigyes won the silver medal in April, 1934, at the European Championships in featherweight class.
In October, 1936, Frigyes was part of the European lineup for the annual "US Golden Gloves vs. Europe" tournament, held in New York.
In the year's five matchups for Hungary, Frigyes won four, beating in the finals, Italians Antonio Mangialardo in Trieste, Aroldo Montanari in Riccione, the German Jakob Schöneberger in Budapest, and Poland's Antoni Czortek.
January 20–25, 1942, a capacity crowd of 8,000 spectators packed the Centennial Hall (Jahrhunderthalle) in Breslau, Germany, today Wrocław, Poland, for the 1942 European Amateur Boxing Championships.
A network television crew wanted to interview them in the camp, but with family remaining in Hungary, Frigyes declined, due to concern about potential reprisals against their relatives who stayed behind.
Frigyes died on July 18, 1984, in Cleveland, survived by his wife of 37 years, Esther, an executive at the Chilcote Company, and their son, Dennis, a lawyer, then in Ohio, later in California, and his two daughters by a previous marriage, Vilma Fülöp and Ágnes Fehér.
The great pipe organ was moved to the Cathedral of St. John the Baptist, the seat of the Roman Catholic Archdiocese of Wrocław.
Although 1942 was long before the time of the acting manager at Hala Ludowa, he illuminated the entire Hall for them and opened up the archives for the family of the late champion.
Through the organist's skill, the result was a flawless rendition of the Hungarian Anthem, played one more time, on the organ on which Dezső Frigyes heard it, 66 years before.