Cook I believe was 199 at the combine. But 5-11 199 doesn't really seem any better than 5-9 188. And Achane is definitely a better looking prospect. Part of it was cook was overdrafted in a year where there was a big hole at rb3, and the bills were searching under every rock for a receiving RB (chasing McKissic and Edmonds, drafting Cook, trading for Hines.Speaking of under 200 pound guys that are SEC battle tested, why is Achane a bigger risk than James Cook was a year ago? Cook was 5-11 190. Achane is probably better built than he was, and he was a 2nd round pick.^^^^ Sproles isn't my comp, but he was previously mentioned in this thread. I think all sub-200 RBs that mattered at all for fantasy are worth noting when discussing Achane. Some are better comparisons than others.
I'm open to the idea that his size might be less of an issue in the new NFL. But usage, even on the right offense is going to cap his upside. Then you have the question of durabilty beyond that. To his credit, he's SEC battle tested.
Sproles isn't a fair comp, but he's not an unreasonable expectation if that makes sense. For example, I could absolutely see Achane in Denver as Payton's new passing game mismatch RB, especially as reports on Javonte Williams are sketchy at best, and Denver has 2 early 3rd round picks.
But 188 is still scary. I don't think there's a hard threshold for weight at RB, but the curve starts to get real steep once you are under 200.