Conversation so far:
How did Art Donovan's career start?
Donovan made his professional NFL debut playing for the Baltimore Colts until 1950.
What was Art Donovan's first team?
The Baltimore Colts
Which team did Art Donovan play for after the Baltimore Colts?
The New York Yanks
Which team did Art Donovan play for last?
Donovan last played for the Baltimore Colts from 1953 until 1961, the same namesake of his rookie debut team.

Question: what did he do after Dallas Texans?
Self-contained rewrite: What did Art Donovan do after playing for the Dallas Texans?