Joseph Karl Gruber was an Austrian football player and manager. A midfielder, he played for Austria Wien, French club Le Havre, Maltese side Floriana and in Germany for Alemannia Aachen and Hamburger SV. He managed Dutch side Ajax between 1962 and 1963 and also coached Alemannia Aachen, DOS, Vitesse Arnhem Pittsburgh Phantoms.

DOS Holland Stichtse Boys Combinatie, commonly known as DHSC, is a Dutch association football club from the Ondiep district of Utrecht. They are currently members of the Vierde Divisie, the fifth tier of the Dutch football league system, and play their home matches at Sportpark Wesley Sneijder.