Robertson won the "Best and Fairest" award for the North Adelaide Under 19s in 1981 and would go on and play 71 senior games for the SANFL club as well as make one appearance for South Australia.
He participated in North Adelaide's 1985 and 1986 SANFL Grand Final losses to Glenelg.
In 1987 North Adelaide made a third successive grand final and this time won, however Robertson missed out as had chosen to sit out the last year of his contract.
This was because the club hadn't granted him a clearance to Collingwood, who had picked him up in the 1986 VFL draft.
[2] He joined North-Eastern Victorian club Euroa in 1990 but returned to Melbourne when Essendon selected him in the mid-season draft.