Well for one, his athleticism is probably far lower (~10 pts) than other PFs on the draft board. To make up for that athleticism difference, his other skills would have to be top notch. Defense and LP are obviously there (99), but his Per, BH, and Pas are "just" really good, not amazing. His rebounding, is just okay, and for a guy with athleticism in the 70s, that just won't cut it in terms of getting onto the draft board. Also, when taking overall rating into account, you're confounding his skills with ratings that don't make a difference on the court. If you made his WE 49 and durability 50 (fairly average ratings), his performance/draft status would be no different, but that 885 would 810.