Conversation so far:
What was Raymond Berry's first coaching job ?
After retiring from playing, Raymond Berry joined Tom Landry's Dallas Cowboys coaching staff as receivers coach.
What year did Raymond Berry join the Dallas Cowboys ?
Raymond Berry joined Tom Landry's Dallas Cowboys coaching staff as receivers coach in 1968.
How many years did Raymond Berry work for Frank Broyles?
Raymond Berry worked for Frank Boyles from 1970–1972.

Question: How long did he stay with Don McCafferty ?
Self-contained rewrite: How long did Ramond Berry stay with Don McCafferty ?