I think he actually did wake up being 6'5 and fast as hell with a 43' vertical. Those are the exact things that don't take any work. Work is hitting the weight room, studying technique and applying that on the practice field. There is a reason dude is built like randy moss and still went undrafted.
Sorry but I disagree. 6'5" tall men don't naturally run sub 4.6 forties. It takes a lot of work to get there. And how many young men at the combine posted a 43" vertical last year? I don't know the answer, but I'd guess not many. And I'd guess the one/s that did, aren't even sniffing 6'5". Stephen Hill may be the only person I can remember from last year with similar measurables, and that young man is an absolute beast - physically. And I doubt Randy Moss and Calvin Johnson woke up one day with their physical attributes as well. They worked their butts off.
He likely has a good work ethic, but doesn't know how to study film, and technique, and fully grasp a playbook. He probably needs someone to spend the time to show him how to be an NFL WR. If I'm a head coach, I'd assign someone to spend long periods of time with him.