Mezue ahịrịokwu na-esonụ: Ọ hapụrụ oge 1975 ma laghachite na-eme ihe site na-emeri 1976 Belgian cross mba aha. Ọ gbaghaara ikwughachi ihe ịga nke ọma ya gara aga na 1976 IAAF World Cross Country Championships, na-abịa 49th, ọ bụ ezie na Belgium were ọlaọcha ọla ọcha. Onye otu ya bụ Léon Schots meriri ọla edo na 1977 IAAF World Cross Country Championship na De Beck nke iri na asatọ hụrụ ka ọ na-ekere òkè na aha otu maka oge nke atọ na ọrụ ya. Ka afọ 1970 na-eru nso na njedebe, arụmọrụ nke ndị otu Belgian belatara: De Beck bụ onye nke 26 na agbụrụ 1978 na 1979, ebe Belgium nọ n'ọnọdụ ise n'asọmpi ọ bụla. Mgbe ọ na-enweghị oge 1980, ọ bụ naanị 64th na 1981. Ọ bụ onye kacha eme nke ọma n'obodo ya n'asọmpi
1982 na 1983 World Cross Country Championships, na-emecha 17 oge ọ bụla.