Suggesting the starting O line allowed 0 pressures doesn't compute. Did you see Justin Fiedlds constantly pressured? Where do they get this stuff?
He was not pressured constantly. Let's break it down. Bear in mind a pressure is defined as a QB throwing the ball before he wants to.
1st Pass - Designed screen where Kmet chips and then settles for the screen. You have to let the defenders get drawn in so that does not count as a pressure. That is the play design.
2nd Pass - Blitz late and Herbert misses the block so the pressure was on him not the OL.
1st Scramble - The rush is pushed past him and he has a pocket to step up into but instead of keeping eyes downfield he tries to run for it. This would not be considered a pressure.
3rd Pass - Jenkins is late on picking up the guy Borom lets go of due to a late blitz. However, Fields easily evades him and so this would not be a pressure because Fields is able to get rid of the ball when he wants to.
4th Pass - This is the rollout where he hits Kmet and there is no pressure.
5th Pass - Screen to Mooney
6th Pass - Pass to Mooney in back of end zone. There is no pressure on this play except at the very end but he had plenty of time to throw so would not be considered a pressure.
7th Pass - He actually gets fooled by a fake blitz and throws it early when there was really no pressure to speak of.