Conversation so far:
Where did Billy Southworth go to school?
Orlando Southworth had wanted his son, Billy Southworth, to attend college. At the age of 19, he signed a contract with the Portsmouth team in the Ohio State League.
When did Billy Southworth start playing?
Billy Southworth joined the Cleveland Indians in 1913, but only appeared in one game, entering as a replacement on defense.

Question: How long did he play for them?
Self-contained rewrite: How long did Billy Southworth play for the Cleveland Indians in 1913?