Mark Schofield:

There are few perfect quarterback prospects, and Darnold is no exception. Yet, at least. But right now his mechanics are wonky at best. His upper and lower bodies are often out of sync, which can lead to some accuracy and/or velocity issues. He has a very elongated, windmill-esque throwing motion that is reminiscent of Tim Tebow. Now, if you've followed my work you'll know that I'm of the mind that mechanics are not a problem until they're a problem. This is something I preached regarding Patrick Mahomes II in this past draft cycle. Right now, his mechanics are not a fatal flaw for him, because he has enough velocity on his throws that, when combined with his ability to anticipate, the mechanics and elongated delivery do not get him into trouble. But that could change once he faces quicker defenses, faster defenders and tighter throwing lanes in the NFL. Then the mechanics become a problem. So I'm interested to see if he cleans that up in the season ahead.