Mustafa Sadık Giz (1911 – 1979) was a Turkish politician and former chairman of the Turkish sports club Galatasaray.
[1] He was a close relative of political leader and former Turkish prime minister Adnan Menderes.
[1] He was elected three times as member of national parliament from Democratic Party as deputy of İzmir.
Although there was no national football league established in Turkey in 1950's, Galatasaray won an Istanbul League title, while Giz was the president.
During his tenure he bought the Galatasaray Islet.