5. Jalen Duren - Memphis
I have similar feelings about Jalen Duren and Oscar Tshiebwe in that it would simply be malpractice to leave him off a list of the draft's best rebounders. Given that he's already been dubbed as "baby Dwight Howard" and has even received some comparisons to Chris Webber, outside of perhaps Chet Holmgren, Duren is probably my pick for best rebounder in lottery range.
To be frank, for how high Duren is being valued at the moment, I do have concerns with his game. While Duren's defensive ceiling is certainly interesting, I'm a bit concerned with the consistency of his motor and overall IQ on both ends of the floor. With this in mind, though, I think many of his issues stem from the fact that Memphis does not have a true point guard that can reliably feed him the rock.
The appeal in Duren is that he'll be coming into the NBA Draft as one of the youngest prospects, is ridiculously strong and athletic for his age, and has glimpses of desirable long-term attributes. He's already an elite shot-blocker, will likely be a very switchable defender in the league that can hold his own on the perimeter, and has shown interesting flashes of passing ability.
If the Spurs think he could be their version of Bam Adebayo, then I would not mind this selection at all.