Conversation so far:
Was Jack Worrall a football player?
John Jack Worrall (20 June 1861 – 17 November 1937) was an Australian rules footballer who played for the Fitzroy Football Club in the VFA, and a Test cricketer.
What was Jack Worrall's position?
Worrall played as a rover
What was good about Jack Worrall being a rover?
He was skilled, fearless, could kick with either foot and was an excellent overhead mark for his size.
What teams did Jack Worrall play for?
Regularly selected for the Victorian team, he is one of very few men to have represented Victoria at both sports.
Did Jack Worrall play football and cricket?
Worrall was one of Australia's great all-round sports people of the nineteenth century, and was involved in Australian football and cricket at the elite level for many decades

Question: When did he become a champion footballer?
Self-contained rewrite: When did Jack Worrall become a champion footballer?