He's projected as a third rounder. From SI.com:
Dorance Armstrong, DE/OLB, Kansas
The 6'4", 257-pound Armstrong is a tweener who played defensive end at Kansas but may have to transition to 3–4 outside linebacker in the NFL. Or he may be able to put on weight and play as a 4–3 defensive end. He’s best at getting to the quarterback, but his sack numbers dropped from 10 in 2016 to 1.5 in 2017 because of a defensive scheme change.
All those factors will depress Armstrong’s draft stock, but a team that can project him into the correct role could find a gem late in the draft.
Dorance Armstrong, DE/OLB, Kansas
The 6'4", 257-pound Armstrong is a tweener who played defensive end at Kansas but may have to transition to 3–4 outside linebacker in the NFL. Or he may be able to put on weight and play as a 4–3 defensive end. He’s best at getting to the quarterback, but his sack numbers dropped from 10 in 2016 to 1.5 in 2017 because of a defensive scheme change.
All those factors will depress Armstrong’s draft stock, but a team that can project him into the correct role could find a gem late in the draft.