Robertson, widely regarded as WA's greatest-ever footballer, is the WAFL's all-time leading goalscorer after booting 1211 majors during his sparkling career for Subiaco.
The star forward won the Bernie Naylor Medal eight times as the WAFL's leading goalkicker, averaging 4.83 goals per game during his time at the Lions.
Robertson's feats in the 1960s and 70s were so amazing that fellow great Graham Farmer even regarded him as the finest full-forward in Australia at the time.
The man nicknamed 'Ocker' won a premiership with Subiaco in 1973 and played a season with VFL club South Melbourne in 1966, booting 60 goals in 18 games during his short stint in Victoria.
Robertson, who was renowned for his accurate set shots on goal, was inducted into the Australian Football Hall of Fame in 2015.
Earlier this year, Robertson told the ABC he suspected he was suffering from chronic traumatic encephalopathy (CTE), and wanted to donate his brain to science once he died.
CTE can only be diagnosed post-mortem.
"I used to get whacked on the head every week. Probably between 10 and 15 times, you'd get a smack on the back of the head which I'm sure wasn't doing any good," Robertson said in May.
"You could deliberately line up a bloke who's got his eye on the ball running towards you … and you could get your shoulder all ready.
"In my day, it was quite deliberate and legal to iron the bloke out.
"And when the bloke got ironed out, of course the crowd roared. It was like, not quite, gladiatorial Rome."
During that interview, Robertson called for players to wear helmets to protect them from brain injuries.
After his career finished in 1974, Robertson played a key role in presenting the concept of World Series Cricket to Kerry Packer and helped get it up and running.
He also managed many of Australia's leading cricketers, including Shane Warne, over a period of 30 years.
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