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NBA draft 2020: The case for Onyeka Okongwu as this class' best big man

Onyeka Okongwu has been modeling his game after Bam Adebayo. Brian Rothmuller/Icon Sportswire

James Wiseman looks the part of an elite big-man prospect and potential No. 1 pick in the 2020 NBA draft. He's 7 feet tall with a 7-5 wingspan, broad shoulders, long strides, nimble feet and a massive standing reach, while displaying a handle and glimpses of a shooting touch rare for a player his size.

But USC's Onyeka Okongwu has entered the best big conversation, sparking a debate among NBA teams about who will wind up as this class' top center, especially given Wiseman's abbreviated resume at Memphis.

"I feel like I'm higher than all of them," the 6-10 Okongwu told ESPN after a recent workout in Los Angeles. "I just do all the little things well. I just play basketball. I know how to win ... I just want to be impactful and have an essential role in helping a team win."

Wiseman might be the more intriguing talent, but a deep dive into Okongwu's film, numbers and approach suggests that he could very well end up having more impact than any other big man in his class.