Murray missing for cup showdown
The midfielder has suffered a reaction to summer groin surgery and is still struggling.
Paul Gallacher, Lee Mair and Michael Higdon are all in line for competitive debuts.
Saints (from): Gallacher, Ross, Camara, Potter, Mair, Thomson, McGinn, Robb, Dorman, Wyness, Higdon, Dargo, Mehmet, Brighton, O’Donnell, Howard.