Jayson Oweh DE ran a 4.36 40!

Why did he have 0 sacks? I’m not saying don’t draft him. I’m just wondering why the lack of production.
Could it be, he does not tackle well? I mean we already have one science project in a DE. Let’s take another. While we are at it, lets trade 2-1’s to move up and get him, when we can get him with the late 1st round pick, or even a 2nd, or 3rd round pick.