Injury and form lapses caused Johnston to miss a place in St. George's 1985 Grand Final side which went down 6–7 to the Canterbury-Bankstown Bulldogs, although he did play in the reserve grade grand final win against Canberra.
Injury and form mistakes led Johnston to miss a spot in St. George's 1985 Grand Final team, which lost 6–7 to the Canterbury-Bankstown Bulldogs, though he did play in the reserve grade grand final victory against Canberra.