Less than a year before the 1976 Toronto Games in Toronto, Canada, Mosby began training for track and field events in Perth and was selected for the Australian team. He was one of 6 competitors and coaches from Western Australia in those Games: wheelchair basketballers Frank Ponta and Victor Salvemini and their coach and team escort, Les Mathews from Wheelchair Sports Western Australia, and Doug Rupe and Paul Gianni representing visually impaired athletes.