Ramzy, thanks for pointing out this:
Each time receivers jogged back to the line after failing to secure a catchable ball, Barrett would single them out, put his hands on their shoulder pads and visibly give them encouragement. He never sulked, got up slowly from being tackled or dared to exhibit any visible frustration - all of which can be contagious. Instead he stayed even and never let his confidence down. I'll do what quarterbacks are supposed to do. You go be great.
This is how you respond properly. I'm glad that some one recognized it.