I suspect it was one of the East Coast youngsters, like the Miz, Hopkins, Margo or Rempe. They were accomplished players at an early age. Steve once told me he ran his first 100 at age 12. He said he had hit 90 at eleven. All the above guys started playing at 5 and 6 years old. I'm pretty sure Allen had run 100 by age 13 as did Petey Margo.
Someone will have to ask them, since they're still around. I know Rempe was beating everyone by the time he was 16, and we knew about him in Ohio already. Hopkins was betting it up at age 16 as well, and playing the best Straight Pool players in New York, and beating them!
Beilfuss was another young phenom from Michigan. He was a terror in the Midwest during his teen years. Everyone knew about him.