Conversation so far:
Where was Joe cronin a player manager?
joe cronin was a player manager with the boston red sox
How long did Joe Cronin work with the boston red sox?
Joe Cronin was a player-manager for the Boston Red Sox for 13 seasons
Did Joe Cronin manage anywhere else besides the boston red sox?
Joe Cronin also managed the Washington Senators

Question: How long did he stay there?
Self-contained rewrite: How long did Joe Cronin stay with the washington senators?