Conversation so far:
What did donovan do when Art Donovan left the nfl?
He published an autobiography, Fatso.
Was the autobiograpghy a hit?
CANNOTANSWER.
What did he do after the autobigraphy was published?
He was noted as a jovial and humorous person during his playing career and capitalized on that with television and speaking appearances.

Question: Did he ever become a sports announcer?
Self-contained rewrite: Did Art Donovan ever become a sports announcer?