Conversation so far:
What did Costello do while he was away from the Kangaroos?
Heffernan returned to Australia and began working for World Championship Wrestling (the Australian version, not the North American wrestling federation) under booker Jim Barnett as a singles wrestler.
Did they perform well during their time in World Championship Wrestling?
The Globetrotters defeated the Mysterious Medics in the finals of the Georgia NWA World Tag Team Championship but only held the titles for a week.

Question: Who were The Globetrotters?
Self-contained rewrite: Talking about Al Costello, who were The Globetrotters?