Just when you thought it couldn’t get worse for Mavericks fans, Dirk Nowitzki is at the Lakers game for Luka Doncic’s LA debut. So the greatest player in Mavs history is supporting the guy who was supposed to be his successor, but who now plays for one of the team’s top rivals. pic.twitter.com/LRQhdDfnJQ

A member of the Dallas Mavericks coaching staff has decided to leave the team following the decision to trade away star Luka Doncic.

It's a bit rarer, however, for somebody else's legend to come to your building to do so, and it's nearly unheard of for someone else's legend to come to your building to do so when he was a major rival of yours during his own playing days and remains employed by his former team.