Conversation so far:
When did Tom Hafey start his coaching career?
After the 1959 season, Tom Hafey left the city of Richmond, taking a job as playing coach of Shepparton in the Goulburn Valley area of northern Victoria
How did Tom Hafey perform as a coach with Shepparton?
Tom Hafey's tenacious attitude and devotion to fitness turned the club into a winner. Shepparton lost the Grand Final in 1961, but won three straight from 1963 to 1965.
Did Tom Hafey coach any other team besides Shepparton?
Tom Hafey returned to Richmond in 1966.

Question: what made him change over from playing to coaching?
Self-contained rewrite: What made Tom Hafey change over from playing to coaching football?