In other words, Mirotic can’t be traded until Jan. 15, but at 12:01 a.m. that day, the Bulls should start taking calls — or making them. They need to maximize Mirotic’s rising value for draft assets likely to turn into solid players when the Bulls are contenders again. By the time that happens — 2019-20 seems realistic — Mirotic figures to be less valuable to the Bulls than the draft pick a playoff team might give up next month for his services. Same goes for Lopez and Holiday, key parts of a Bulls team flirting with mediocrity that 50-win teams could view as rotation players.