Conversation so far:
When did curly Howard's career begin?
Curly Howard's first on-stage break was as a comedy musical conductor in 1928
What musical was Curly Howard's first on stage break as a comedy musical conductor in 1928?
the Orville Knapp Band
Was curly howard's first on stage break as a comedy musical conductor in 1928 with the orville knapp band successful?
What did Curly howard do next after the orville knap band?
The Three Stooges“

Question: When did he become the third stooge?
Self-contained rewrite: When did Curly Howard become the third stooge?