He retired due to a bad back(two fused vertebra I think). Here is an article about him. I used to like him. i have an autograph rookie card from when he played in Charlotte. CK http://www.nba.com/suns/news/chapman_quotes_001120.html
When he played with charlote he was one of the top 2 guards in the league. He also had some of the nastiest jams of any white boys around.
He should have been out of the game years ago, but he can't go home because he hates his wife. You know who I'm talking about, the one who gets plastered every year at the Christmas party and calls him a r****d.