McDonald won 27 metropolitan races in his earlier stint riding in the Sunshine State and competed in an array of black-type events.
While he struggled with his weight at times as many jockeys do, McDonald admits that it was always his away from racing actions that led to his issues.
“My life spiralled out of control with substance abuse and alcoholism, it was mainly alcohol as I was drinking a lot,” the returning hoop said.
“My weight was impacted because of the drinking.
“It was always my off-track antics that did not help me in life.”
Deagon trainer Michael Lakey gave McDonald his last race ride at Kilcoy in late April of 2017.
Lakey will hand the returning hoop his comeback opportunity at Gympie on Saturday.
While McDonald had been away from race riding for a number of years at the time, he reflects that his life really spiralled out of control and he went ‘off the rails’ around three years ago.
Harley McDonald was tragically killed in a work place accident.
In detailing his lowest points, the former top jockey hopes that anyone struggling with personal or mental health issues can learn from his experiences.
“I was screaming out for help and I was doing it the wrong way,” McDonald said.