defensive rating:
Jusuf Nurkić 105
Maurice Harkless 108
Enes Kanter 109
Al-Farouq Aminu 109
Zach Collins 110
Meyers Leonard 111
Evan Turner 111
Jake Layman 112
Damian Lillard 112
Rodney Hood 113
CJ McCollum 113
Seth Curry 114
defensive box plus/minus:
Jusuf Nurkić 3.6
Maurice Harkless 2.3
Zach Collins 1.0
Al-Farouq Aminu 0.8
Evan Turner 0.7
Enes Kanter -0.3
Meyers Leonard -0.4
Jake Layman -0.6
Damian Lillard -1.1
Rodney Hood -1.2
Seth Curry -1.8
CJ McCollum -1.9
defensive real plus/minus:
Hassan Whiteside +3.61
Nurkic +3.35
Harkless +1.69
Aminu +1.46
Zach +0.93
Kent Bazemore +0.15
Layman -0.39
Hood -0.46
Tolliver -0.46
Hezonja -0.61
Turner -1.01
Kanter -1.46
the first two sets are from bbref; the last is from espn
defensive stats have a lot of noise and they tend to favor big men. That's something to keep in mind. They can also be real team-centric and have skew due to rotations
defensive rating is much more of a team stat than an individual stat. I think the best gauge you can draw from defensive rating is to compare the team mark to individual marks. That will tend to highlight plus defenders. For instance, Portland's defensive rating was 110.5. That means Nurkic was +5.5 better than the team mark; Harkless +2.5 better; Aminu +1.5 better; Zach +0.5 better. Turner was -0.5 worse; Dame -1.5 worse; CJ and Hood were -2.5 worse. Now, CJ had the benefit of playing lots of starting minutes with Nurk, Mo, and Aminu, while Hood didn't, so maybe you could say Hood was a little better.
the big takeaway from defensive rating is that 7 of the top 8 from last season will be gone when the season starts. Whiteside will go quite a ways in mitigating that deficit, but it's unclear yet if his defensive impact will be as big as Nurkic's.
Zach as a starter will help, but he's a PF/C and if he spends much time trying to defend guys like Kawhi, and PG13, and Lebron, and Giannis, he's going to be sitting on the bench in foul trouble
all those numbers above match the eyeball test. I disagree about Mo and Aminu getting abused by the premier big wings in the NBA. Yeah, those guys put up numbers but they did that against everybody. Anybody who thinks that Hood/Bazemore/Hezonja is not a major downgrade defensively from Harkless/Aminu/Turner has some blinders on. The question is can that first trio provide enough offense to offset their defensive weaknesses. Personally, I don't think they can, but that's what a season is about