He’s way to arrogant to have the jitters.... he has the “oh crap, I’m not faster than the defensive linebackers, and my arm may not be good enough to throw these crazy throws that used to work” syndrome.
If Manziel was arrogant when he was drafted— the Browns should have started him all season. The arrogance might have served him wellthrough a few games
Now he looks as though he has no self-confidence. That watching the season has left him convinced (as many of us were fro the start) that he simply doesn’t have what it takes to play in the NFL.