Kammala jumla mai zuwa: Aikin De Beck ya zo daidai da wani lokaci mai karfi na tseren nesa na maza a Belgium a cikin shekarun 1970, tare da Roelants, Willy Polleunis, Emiel Puttemans, Karel Lismont da Ivo Van Damme sune sauran jarumai. Ƙungiyar
1973 IAAF World Cross Country Championships ya nuna bikin ƙaddamar da gasar zakarun duniya ta zamani kuma, wanda aka gudanar a gidan gida a Waregem, ƙungiyar Belgian uku na Polleunis, Roelants da De Beck sun lashe taken farko na ƙungiyar (De Beck ya sanya 18th daban-daban). De Beck ya lashe lambar farko ta kasa a tseren ƙasa shekara guda bayan haka. Ya haifar da tashin hankali a 1974 IAAF World Cross Country Championships ta hanyar lashe taken gaba da Mariano Haro (mai tsere na 1973) kuma ya jagoranci mazajen Beljium zuwa lambar zinare ta tawagar.