Conversation so far:
Is Y. A. Tittle in the hall of fame?
Y. A. Tittle was inducted into the Pro Football Hall of Fame in 1971
Was Y. A. Tittle famous?
Morris Berman's photo of a dazed Y. A. Tittle in the end zone is regarded among the most iconic images in the history of American sports and journalism.
Was Y. A. Tittle regarded as a great quarterback?
Although he was never able to deliver a championship to the team, Y. A. Tittle's time in New York is regarded among the glory years of the franchise.

Question: What is his legacy?
Self-contained rewrite: What is Y. A. Tittle's legacy?