Conversation so far:
What was Bob Feller doing in Bob Feller's later life?
Feller was elected the inaugural president of the Major League Baseball Players' Association in 1956.
What did he do as president of the association?
As president, he appeared before Congress to speak about baseball's reserve clause.
What other things was he doing?
Feller was the first player to get a franchise to agree to a share of game receipts when he was the starting pitcher for Indians' games.
Was the the first to do anything else?
He was also the earliest player to incorporate himself (as Ro-Fel, Inc.).
Did he have other firsts?
He was also one of the first players to work for the right of a player to enter free agency.

Question: What other things were going on in his later life?
Self-contained rewrite: Aside from incorporating, being president of the MLB association, and his work with free agency, what else did Bob Feller's do in his later life?