Left played during the 1990s in the 2nd Bundesliga at the clubs VfB Oldenburg and FC 08 Homburg. In 1995 he moved to Hannover 96, where he rose to become the role model of the fans. In 1998, he succeeded with the crew of the ascent from the Regional to the 2nd Bundesliga and 2002 from the 2nd to the 1st Bundesliga. There he played his first league game at the age of 36 years. During his active time in which he played 215 games for the Reds, had left the crowd favorite Hanoverian. He is still called by the fans " football god ".
Overall, Carsten Linke graduated 313 games in the Bundesliga 2, in which 47 goals reach him. In the Bundesliga, he brought it in the last season of his professional career at 15 games and one goal.
After his career end of 2003 he was assistant manager of the club, and later sports manager. On 30 March 2007, the cooperation between Hannover 96 and Carsten Linke was stopped early because its task field overlapped with that of the new 96 - sporting director Christian Hochstätter.
Since February 21, 2008 Left held the post of sporting director of FC Carl Zeiss Jena. On 23 March 2009 he was released from the function of sports director and worked until the end of his contract in June 2009 as Managing Director of FC Carl Zeiss Jena GmbH gaming operations.