Early career Van Buyten joined
Olympique de Marseille in the summer of 2001, leaving
Belgian side
Standard Liège with whom he had been with since 1999. After two-and-a-half productive seasons with the club, on 31 January 2004 Van Buyten agreed to a short-term loan agreement with
Manchester City, signing for the
Premier League club until the end of the
season. He proved to be a success in his half-season loan deal at the club, garnering praise from his manager, specifically in his performance against
Chelsea. But former manager
Kevin Keegan conceded that, "I don't think we will keep him at the end of the season as I feel he will go to a big club then." Van Buyten returned to Marseille at the end of his loan agreement and was signed by
Bundesliga club
Hamburger SV in June 2004 to replace outgoing captain
Nico-Jan Hoogma, agreeing to a four-year deal with the German side. For Hamburg he made 61
German top-flight appearances.
Bayern Munich In June 2006,
Bayern Munich announced that they had acquired Van Buyten from Hamburg and had signed him to a contract lasting through the
2009–10 season. Van Buyten had a highly successful first season at the
Bavarian club, forming an effective centre-back partnership with
Lúcio. Van Buyten scored his first goal for Bayern against
Energie Cottbus on 9 December 2006, scoring the game-winning goal of a 2–1 victory for
Die Roten. Van Buyten then scored his second goal for the club on 26 January 2007, levelling the sides at 1–1 but Bayern fell to
Borussia Dortmund by a score of 3–2. Arguably Van Buyten's most valuable contribution in his debut season, however, came against
Milan on 3 April 2007, in the first-leg of the
UEFA Champions League quarter-final. Van Buyten scored two away goals to level the match and give Bayern Munich the advantage in the tie. In the quarter-final encounter against Milan, he scored twice with his left foot, once in the 78th minute to take Bayern to 1–1 and then he scored a stoppage time half-volley. On 4 February 2010, Bayern Munich announced that Van Buyten had signed a new contract that would keep him at the club until 2012. During the second half of the 2010–11 season, Van Buyten was mostly relegated to bench player status, but recovered his starting spot towards the end of the season. He was part of the squad that blitzed
FC St. Pauli on 11 May 2011, netting a goal in an 8–1 victory that condemned the
Hamburg-based side to relegation to the
2. Bundesliga. On 17 December 2011, in the match between Bayern Munich and
1. FC Köln, Van Buyten struck a free-kick so hard that the ball burst. On 30 April 2012, Van Buyten signed a one-year extension with Bayern Munich. Despite the arrival of centre-back
Dante from
Borussia Mönchengladbach in the summer of 2012, Van Buyten became an integral member of the back-line for the Bavarians during the
2012–13 campaign, part of a three-man rotation in the centre of defense with Dante and
Jérôme Boateng. On 6 April 2013, with a 1–0 defeat of
Eintracht Frankfurt thanks to a goal from
Bastian Schweinsteiger, Van Buyten celebrated his third
Bundesliga championship with Bayern, clinching the club's 23rd national title. Van Buyten played the full 90 minutes in the club's 3–0 second leg semi-final victory over
Spanish champions
Barcelona on 1 May, clinching a resounding 7–0 aggregate victory and a place in the
Champions League final against fellow Bundesliga side Borussia Dortmund. Van Buyten is the first Belgian player in a Champions League final. After heavily been linked with big spenders
Monaco, Van Buyten signed a further contract extension with Bayern Munich on a one-year rolling contract. Having been a part member of the squad under manager
Pep Guardiola, and despite scoring against
Werder Bremen, Van Buyten was rumored to join
1. FC Köln on a pre-contract agreement, though this was denied by a club official. After the end of the season, the club did not renew his contract, leaving him a free agent to sign with another club.
Belgian Pro League club
Anderlecht offered him a two-year contract in August 2014, but he rejected it, stating that he had retired from competitive football. ==International career==