Goes At the age of eight, De Munck often watched practice sessions of local club
VV Goes, where he was often invited to be a
goalkeeper, for the first-team players to do shooting practice.
Sittardse Boys During
World War II, De Munck was given the opportunity to play for German club
TuRU Düsseldorf through a German officer. Because he refused, he had to work in a German arms factory. but te turned down the offer as not to jeopardise his chance of being selected for the national team – in which only amateur players were allowed – and he made his debut for the
Netherlands in 1949. In 1950,
Ajax made him an offer. The move, however, did not materialise after it became known that De Munck had received money while in Sittard, something the
Royal Dutch Football Association (KNVB) were fiercely against, as they still adhered strictly to the amateur principle. As a result, De Munck was banned from the KNVB participation for one year. Like many of the best Dutch footballers of his time, he then moved abroad.
1. FC Köln De Munck was the first professional footballer to appear for
1. FC Köln. He immediately showed his talent after arriving at the club, and "on the [goal-]line and in control of the penalty area [he was] equally strong," which helped the
Cologne-based team finished the season with the fewest goals conceded, securing a fourth place. In his second year at the club, he competed against
Fritz Herkenrath in goal. However, the future
German national goalkeeper left the club after twelve months after losing the competition for becoming the starter to De Munck. 1. FC Köln finished the following seasons with fifth (and again the fewest goals conceded) and second place, before reaching the
DFB-Pokal final as well as the in 1954. Köln narrowly lost in the
1954 German football championship and also lost the DFB Cup final against
VfB Stuttgart 1–0. He finished his stint in Germany with more than 100 league appearances in which he scored two goals. He also made seven appearances in the final play-offs for the
German championship, three games for the West Cup and two games for the DFB-Pokal.
Fortuna '54, DOS and retirement against
Ajax in 1960 De Munck joined the newly founded, first Dutch professional club,
Fortuna '54 from Geleen in 1954, who initially competed in the professional league of the
NBVB, and since in the newly merged national league of the KNVB which became the new
Eredivisie in 1956. With Fortuna, De Munck won the national cup tournament, the
KNVB Cup, in 1957 after a 4–2 win in the final over
Feijenoord before he moved to
VV DOS, a predecessor club to the contemporary
FC Utrecht. He led DOS to the championship in his first season; the club's first and only championship. He stayed with DOS until 1961, after which he, at age 39, started playing for second-tier
Eerste Divisie club
Veendam. After his period in Veendam, until 1963, De Munck played for
Cambuur and
Vitesse. De Munck retired at the age of 44 after a
friendly match between Vitesse and 1. FC Köln on 28 May 1967. ==International career==