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.
What other actors played this role?
Jason Marsden (1986-1988), Christopher Nelson (1988), Justin Whalin (April 1988 - 1989).
On June 20, 1991, Gerald Hopkins stepped in.

Question: Were there any other actors?
Self-contained rewrite: Were there any other actors besides child actor Eric Kroh, Abraham Geary, Jason Marsden, Justin Whalin and Gerald Hopkins in Casting?