Career
Käck started playing football with Djurgårdens IF when he was six years old and stayed with the club throughout his youth career. At the age of 18 he went on loan to fifth tier side Värtans IK and after leaving Djurgården the following year he played for fourth tier club Värmdö IF and then Hammarby Talang FF in the third tier Division 1. Käck joined Djurgården from IK Sirius after the 2014 season.
He made his Allsvenskan debut on 9 April 2015 in the BK Häcken–Djurgårdens IF 1–1 draw.
He spent most of the season being the backup for the left back position but toward the end he became a regular starter. Käck considers himself a Djurgården supporter.
When he was younger he attended all the home games and derbies and stood in the singing section.
