Conversation so far:
how did Art Donovan's career start?
In each of his first three seasons, Donovan played for a team which went out of business.
which was the first team?
He started out with the first Baltimore Colts, who folded after his rookie season in 1950.

Question: who did he play for next?
Self-contained rewrite: who did Art Donovan play for after the Baltimore Colts?