When a fourth name was added to the Chicago Bulls' list of finalists earlier this week, a new question started to emerge. Dave Lewin came out of left field. The Celtics' assistant GM wasn't even mentioned in the first wave of initial reporters regarding the organization's top candidates. Then, after Minnesota's Matt Lloyd, Detroit's Dennis Lindsey, and Atlanta's Bryson Graham were named as three finalists, Lewin was suddenly thrown into the mix . To be clear, no one is questioning his credentials. While he may be one of the lesser-known candidates, he has been a fundamental part of the Celtics' very successful brain trust in recent years. One of the youngest candidates on the list, he has also established himself as an analytics and data enthusiast. So does Lewin have a legitimate shot at earning the Bulls' next lead job? Yes, but including both him and the 39-year-old Graham among the finalists has some wondering if Chicago could try to structure their upstairs differently.…