Conversation so far:
Who played Quartermaine?
The newborn A.J.
was portrayed by child actor Eric Kroh from 1979 to 1983.
Abraham Geary briefly stepped into the role in 1983.
Who was cast in 1983?
CANNOTANSWER.

Question: What other actors played this role?
Self-contained rewrite: What other actors besides child actor Eric Kroh and Abraham Geary play in A. J. Quartermaine's role in Casting?