Detroit Pistons draft preview: Okongwu a modern-day prototype big whose ceiling will be determined at offensive end

History says it’s a virtual certainty a future All-Star, perhaps even a future MVP, will be available when the Pistons go on the clock to make the seventh pick in the 2020 NBA draft. It’s too early to judge the 2018 and ’19 drafts – though early returns suggest form will hold as young players…