I copied parts of a post from Real GM which showed his rankings relative to last year's combine, and notes things beyond his really unusual wingspan.
"These are by far the worst combine numbers I've seen for a lotto wing.
Weight: His weight is low for a 6'9" listed player. You want a healthy 220 lb there. This is Brandon Ingram college level weight.
Hangs: His hand length puts him 60th out of 65 players based on last year's combine. So that is bottom 8 percentile. His hand width puts him 63rd out of 65th. He is tied for 5th narrowest in the last 5 years. This dude's hand is small. All the small hand p layers are small PG sized players, not 6'9" wing players.
Vertical: his running vert is 62nd out of 65 based on last year's combine. His standing vert is 63rd. Keep in mind that the people down here are centers/PF .
Agility: Memphis' 3/4 court and lane agility are both incorrectly set up. He slower than the slowest player form last year, so this is likely wrong. His reaction shuttle puts him 18th out of 65th if you believe the agility numbers out of Memphis.