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.).

Question: Did he have other firsts?
Self-contained rewrite: Did Bob Feller have other firsts aside from being the first player to incorporate?