Being expected to turn a struggling franchise around is one thing, but Campbell has gone through more than that. He had a different offensive coordinator every year, so he was basically a rookie for his first six years.
Part of the comfort of being a veteran is knowing your team's system and what is expected of you in it. That changed for Campbell every single year, and blame was placed on him for losing.
He then got traded to the Raiders, where Bruce Gradkowski was a fan favorite because of two games he played well in back in '09. It wasn't pretty for Campbell right away, and he heard boos and "Bruuuuce" chants after every incompletion.
Then-head coach Tom Cable also favored Gradkowski, so he was quick to pull Campbell when he struggled. Cable at one point made Gradkowski the starter, but then he got hurt, and Campbell led the Raiders to a 3-1 record.
When Gradkowski returned, it was back to the bench again for Jason until Gradkowski got hurt again. Campbell, after a meeting with then-offensive coordinator Hue Jackson, started to show he was up to the task.
A microcosm of Campbell's mental toughness was in Week 9 against the Chiefs. Campbell was 4-of-10 for 18 yards, one interception and a horrible quarterback rating of 8.33.
Instead of tanking it, Campbell straightened up and flew right in the second half. With a lot of help from Jacoby Ford, Campbell was 15-of-23 for 211 yards, one touchdown and a quarterback rating of 109.14 in the second half.
He turned a sure disaster into an exciting win for the Raiders.