I think Trevor will last this season. He has a better line. He has learned to get rid of the ball rather than take a sack. I think he has also learned to get rid of the ball quicker and not hold and run like early last year. He also has a better stable of running backs along with more shotgun formation to see the hit coming. 

I have no idea about Chad Kelly. He has talent but he is a loose cannon. With his history, I am not so sure he won't be out of the league in a year or two.