Conversation so far:
What was Y. A. Tittle's playstyle?
Y. A. Tittle threw the ball from a sidearm, almost underhand position, something novel at those times.
Did Y. A. Tittle choose to throw the ball from a sidearm or did it come to him naturally?
Was Y. A. Tittle's playstyle effective at first or did he have to work at it?
Despite his throwing motion, Y. A. Tittle had a very strong and accurate arm with a quick release.
Are there any other intersting aspects about Y. A. Tittle's playstyle besides throwing side arm with a quick, accurate release?
His ability to read defenses made Y. A. Tittle one of the best screen passers in the NFL.
Did Y. A. Tittle coach at all with the talent to read defenses?
After his retirement, Y. A. Tittle rejoined the 49ers staff and served as an assistant coach before being hired by the Giants in 1970 as a quarterback mentor.

Question: What was notable about his profile?
Self-contained rewrite: What was notable about Y. A. Tittle's profile and playing style?