Conversation so far:
What did Charles Haley do with the Dallas Cowboys?
Charles Haley is often mentioned as the final piece that helped propel the Dallas Cowboys into a Super Bowl contender.
Was Charles Haley succesful?
Charles Haley was elected to the Pro Football Hall of Fame in 2015 after several years of eligibility.
Did the Dallas Cowboys win the Super Bowl with Charles Haley?
Charles Haley won three Super Bowls with the Dallas Cowboys.

Question: when did he retire?
Self-contained rewrite: When did Charles Haley retire from the NFL?