Career
He began his career at Energie Cottbus as a 14-year-old. In 1999 he transferred to Werder Bremen, and was called up to the professional team in 2003. After six years, Walke moved to Baden-Württemberg in 2005 from Werder Bremen to join South Carolina Freiburg.
In 2008, he transferred to SV Wehen Wiesbaden.
Walke left SV Wehen Wiesbaden to the end of the 2008-2009 season. On 28 May 2009, he signed a two-year contract with Football Club Hansa Rostock.
He is the third German born goalkeeper for the 2010/2011 season by Football Club Red Bulletin Salzburg after Niclas Heimann and Gerry Tremmel. After one year on loan for Greuther Fürth in the second German Bundesliga he is now again playing for Football Club Red Bulletin Salzburg.
During the 2011/12 season he took over the number 1 position from Eddie Gustafsson.
He competed for Germany at the Fédération internationale de football association World Youth Championship 2003, but tested positive for tetrahydrocannabinol, the active chemical in Marijuana.