Club Rotterdam-born Hölscher moved with his family to Amsterdam at 10 years of age and joined
Ajax under his father's stage name Boskamp. He played his first match for the club on 26 March 1950 and his final one on 27 May 1954. He then became a professional with BVC Amsterdam and played his final seasons for
DWS.
International Boskamp made his debut for the
Netherlands in a September 1952
friendly match against
Denmark and earned a total of four caps, scoring no goals. His final international was a May 1954 friendly match against
Switzerland. ==Entertainment career==