Watch: Positionless prospect Peppers lights up 40-yard dash

There are still questions about where Jabrill Peppers will play in the NFL, but there's no doubt that wherever he plays, he'll be fast as hell.

The former Michigan standout ran the 40-yard dash with the linebackers Sunday and posted an official time of 4.46 seconds in his second attempt, more than one-tenth of a second faster than his nearest rival.

The 21-year-old said he believes he's a safety at the next level, and will reportedly attempt to prove it by doing drills with both the linebackers and defensive backs.