Match-fixing is a hot issue in snooker at the moment after Stephen Lee received an unprecedented 12-year ban for fixing last month.
Lee was found guilty of manipulating the results of seven matches played in 2008 and 2009 including in the UK and world championships.
When that verdict was announced O'Sullivan claimed "many more" snooker players were throwing matches, and has now revealed in his autobiography that match-fixers tried to recruit him.
"Someone rang me and said he'd like to meet me over in the forest and have a walk through the woods," O'Sullivan wrote.
"What they were offering, 20 grand. I could get for a couple of nights' work.
"If anyone could get away with it, I could. I could just play one-handed, or left-handed or just put a towel over my head and pretend I was going nuts. But it's not something I would or could do. I couldn't live with myself; I'd feel that was robbing somebody."