Conversation so far:
When did Tyson start boxing professionally?
Tyson made his professional debut as an 18-year-old.
Who did he fight in his debut?
Hector Mercedes.
What other people did he fight?
James Tillis, David Jaco, Jesse Ferguson, Mitch Green and Marvis Frazier.

Question: Was he starting to become famous at this point?
Self-contained rewrite: Was Mike Tyson starting to become famous after fighting Hector Mercedes?