After watching some of Klein on youtube, I am a little surprised that he is being considered a likely late round QB. He has basically a lot of the same qualities that made Brock Osweiler a 2nd round pick last year.
Klein "pushes" the ball when he throws it and doesn't show a ton of arm strength. He has a funky delivery too although many QBs in recent years have shown that if your delivery is fast enough, then it's doesn't matter as much what it looks like. Klein gets the ball out fast enough.
The thing I noticed about Klein though is that he rarely steps into throws. If he did, it would improve his velocity. Ask any pitcher and they'd tell you that lower and middle body muscles are the real force behind their 95 mph fastball. If his arm strength improves and he learns to sell a pump fake better, he would actually be a fairly complete QB- basically like a more consistent Osweiler. And for a guy that has such a fixable looking throwing problem, I was surprised to see that his footwork was actually pretty good. Good footwork is typically more uncommon in college than good throwing mechanics.
I'm not really a huge fan of Klein per se, but when I watch him I don't see why he should be any lower than Tyler Bray or Landry Jones on anyone's draft board.
Finding non-highlight footage of him from this year wasn't easy either (I only found his game from Kansas earlier this year)- indicating that most people just don't consider him to be much of a factor on draft day. I did find this gem though:
Again, I'm not advocating for Klein, I just think it's curious how one fixable flaw could cause Klein to be a late rounder instead of a 2nd rounder. Could this be a case like last year where draftniks are really underestimating his draft stock, as they did for Martin and Tannehill last year?