Joel Lorenzi: Billy Donovan says Zach Collins is cleared for contact. “But I think in Zach’s case, he’d like to get some contact practices in.” Says the hope is that he’ll get to practice with Windy City this week, and if it goes well, he’ll be back in by the end of the week.x.comThis article originally appeared on Hoops Hype: Joel Lorenzi: Billy Donovan says Zach Collins is …