 In Baylor's Department of Radiology, Holmquest was assigned as an assistant professor of radiology and physiology and associate director of nuclear medicine.His leave of absence was extended to September 1973, and he completed training in nuclear medicine at Baylor.When it became clear that he would not be assigned to any Skylab mission after Skylab B was scrapped, he formally resigned from the Astronaut Corps in September 1973.