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.
Were there any other actors?
actor Billy Warlock was hired for the role of A.J., and he made his debut on June 13, 1997.
Were there any controversies with the casting?
In early 2005, the network's announcement of Warlock's return as A.J.
was briefly put on hold, speculated as contract disputes.

Question: Did those get resolved?
Self-contained rewrite: Did the controversies with actor Billy Warlock's return as A.J. briefly put on hold in the casting get resolved?