Larry Brown has an interest in joining Doc Rivers’ Boston Celtics staff as an assistant coach, assuming Lawrence Frank accepts the Detroit Pistons’ head coaching job, league sources told Yahoo! Sports.

Frank and the Pistons are discussing terms of a deal over the weekend, league sources said, but there is still no agreement in place. However, the Pistons and Frank are both anxious to forge a partnership.

Despite Brown’s credentials and good relationship with Rivers, the Celtics coach is inclined to promote a well-regarded young assistant on his staff – Mike Longabardi – sources said. Nevertheless, Rivers hasn’t ruled out the idea of further discussing a spot for Brown on his bench next season.