Conversation so far:
When did Mike Tyson start boxing professionally?
Mike Tyson made his professional debut as an 18-year-old on March 6, 1985, in Albany, New York.
Who did Mike Tyson fight in his debut on March, 1985?
Mike Tyson defeated Hector Mercedes via first-round TKO.
What other people did Mike Tyson fight in his early career besides Hector Mercedes?
Mike Tyson fought James Tillis, David Jaco, Jesse Ferguson, Mitch Green, and Marvis Frazier.
Was Mike Tyson starting to become famous in the first year of his professional career?
Mike Tyson's win streak attracted media attention and Tyson was billed as the next great heavyweight champion.

Question: When did he get his big break?
Self-contained rewrite: When did Mike Tyson get his big break in his professional career?