Conversation so far:
What year did Harry Caray begin broadcasting for the St.Louis Cardinals?
Harry Caray caught his break when he landed the job with the Cardinals in 1945.
What role did Harry Caray play for the St.Louis Cardinals?
Harry Caray proved as expert at selling the sponsor's beer as he'd been in selling the Cardinals on KMOX.
How long did Harry Caray work with them?
Following the 1969 season, the Cardinals declined to renew Harry Caray's contract after he had called their games for 25 years

Question: Why was he let go after so long?
Self-contained rewrite: Why was Harry Caray let go by the St.Louis Cardinals after so long?