After the war Kalember wanted to continue to play football but Slobodan Ćosić persuaded him to play basketball where was less competition. He was present at the famous meeting in Deligradska Street when formed Crvena zvezda Sports Association. In beginnings, he was in reserves, but quickly become the standard first team player status of Crvena zvezda. In July 1950, he was a member of the Zvezda squad that won an international cup tournament in Milano, Italy.