Robert Klaasen

Early years

Klaasen started his football career at the age of six at Zeeburgia. He left the club after a year for Ajax's youth academy. After playing in Amsterdam for five years, he moved to the youth academy of HFC Haarlem. There he played one year in the academy before moving to Feyenoord in 2006. He then joined AZ from Feyenoord's youth academy in 2007, and signed a two-year senior contract with the club on 19 May 2011. Coming through the AZ academy, Klaasen described himself as a "holding midfielder, with a good shot and vision. I can be compared to Stijn Schaars." Ahead of the 2012–13 season, some of the club's talents, including Klaasen, were given the chance to join the first team's pre-season friendlies. He would, however, play the season with the youth team. At the end of the season, Klaasen's contract was terminated.

Kortrijk

Prior to the start of the 2013–14 season, Klaassen trialled with Kortrijk. He tested for around four weeks before it was announced that he became part of the team, signing a three-year contract on 20 July 2013. Klaasen made his professional debut on 27 July 2013, replacing Gertjan De Mets in the 78th minute of a 1–0 home win over OH Leuven. On 7 December 2013, four months after his last appearance, he scored his first goal in professional football, the 1–1 equalizer in the 87th minute against Sporting Charleroi. He made his first start on 22 February 2014, playing the full ninety minutes against Mons.

Sparta Rotterdam…

As of match played 5 December 2025

Klaasen is the son-in-law of Wilco van Schaik, who became chairman of NEC Nijmegen in 2017.

Sparta Rotterdam

Eerste Divisie: 2015–16