Surely he made a new identity and went back through college as "Greg Oden" - In his mid 20's his body added a lot of weight and muscle and he said to himself I think I can lie about my identity and go to college as a basketball player and maybe I'll make a few million dollars off of it. He was a bust in the NBA because in reality he was 35 his first year.
I'm 70% sure this is truth.