Both D.J Metcalf and Gary Jennings had terrible pre-draft times in the 3-cone drill, Metcalf at 7.23 (which likely caused him to drop at least a full round), and Jennings at an even worse 7.32. Is this a cause for concern? Well, according to at least one scientific analysis, it isn't, at least not for wide receivers. In fact, none of the combine drills are a good indicator of future NFL success for wide receivers.
If you need more convincing, consider that former oversized All Pro receivers Calvin Johnson, Demaryius Thomas and Josh Gordon all failed to beat the 3-cone times of Metcalf and Jennings -- because none of them actually ran it. It's a good thing that Metcalf and Jennings did, because otherwise there's a good chance they never would have dropped to us.
If you need more convincing, consider that former oversized All Pro receivers Calvin Johnson, Demaryius Thomas and Josh Gordon all failed to beat the 3-cone times of Metcalf and Jennings -- because none of them actually ran it. It's a good thing that Metcalf and Jennings did, because otherwise there's a good chance they never would have dropped to us.