BJ was my head coach at Glenbrook North, back in the day. He left in 1995, after North's second trip downstate, to take an assistant's job under Doug Collins in Detroit. Three years later, when Doug was fired and his staff was let go, BJ nearly went to St. Charles, but at the last minute, the Toronto Raptors came calling, and he spent three years there as an assistant. From there, it was a stint in Washington, again as an assistant to Doug. When Michael Jordan calls and offers you a job, you say yes. The last couple of years, since the Wizards turned over staff, he's been scouting and doing TV commentary.
[Edit: I don't know how I left BJ's full name out of the first line...]