Born in Karabük, Kaş started his professional career with Beşiktaş J.K. in the Süper Lig at the age of 18, signing a four-year deal.

[1] Shortly before the 2008 summer, Kaş agreed terms with Spanish club Getafe CF, joining for 2008–09 on a Bosman transfer.

[3] However, during his first year, Kaş only made a handful of appearances for Getafe, being subsequently loaned to former team Beşiktaş in August 2009, in a season-long move.

[4] In the 2011 January transfer window he again returned to his country and signed for Bursaspor, playing his first official game in the season's UEFA Europa League against FC Gomel.

However, he had to leave the game early on, due to injury, as the national side eventually won it 2–1[5] and qualified for the final stages, for which he was not picked.