From an ESPN 2016 re-draft article:
Ford: 5. Ante Zizic, Boston Celtics
I debated between Yabusele and Zizic and I know the Celtics are very high on both, as are NBA scouts for some other teams. His size, strength, toughness and skill set make Zizic a big man to watch for the Celtics' future. If Jaylen Brown improves, the Celtics will have had a heck of a draft. And who would've thought Brown might be their third best prospect from 2016?
Pelton: 5. Ante Zizic, Boston Celtics
I'm going with the other first-rounder the Celtics stashed, No. 23 pick Zizic, who has split time between KK Cibona in his native Croatia and Darussafaka in Turkey. Between the two stops, Zizic has averaged 20.5 points and 10.0 rebounds per 36 minutes on 67.0 percent shooting. Just 20, Zizic could be part of Boston's rotation next season when he's scheduled to join the team.
In the longer term, he could follow in the footsteps of Nikola Jokic and Jusuf Nurkic as centers who have translated success in the Adriatic League to the NBA.
Jokic is probably outside his reach, but I could see him surpass Nurkic easily enough. His post game is raw, but he's 20, has improved rapidly and steadily and, despite the infinite wisdom of CBlog, the Cs are happy with him.