Sure, Joe Mazzulla won a title with the Celtics. But being featured as a clue on Jeopardy! is a sign that he's truly made it.

Charles Lee won a championship as the lead assistant on Joe Mazzulla's staff with the Boston Celtics last season. When Lee left to become the coach of the Charlotte Hornets, Mazzulla informed Lee that he was now the "enemy" and shouldn't expect to chat like they did when they were on the same side.

Friendships between NBA stars from different teams are far more common today than they were a generation ago. Does the same apply to NBA coaches? Not for Joe Mazzulla. The Boston Celtics head coach explained Friday that he’s cordial with and respectful of his counterparts from other clubs.