Career
He started his football (soccer) career in 1957 playing for a local club in his home town of Čapljina. In 1959 he moved to FK Željezničar, where he also made his debut in the Yugoslavian First League. In 1960, Fazlagić stayed in Sarajevo but switched clubs and made his first appearance for FK Sarajevo.
He played 450 matches for FK Sarajevo in the Yugoslavian First League.
His farewell match for FK Sarajevo was against Sporting Communist Party at the Stadium Koševo, a 2–2 draw. On the international stage, Fazlagić made 19 appearances for Yugoslavia.