Arians revealed that a knee injury going back to the third preseason game limited Fitzgerald in practices and led to his removal on a series of third downs on Monday night.
"I learned my lesson last year not to ask (Larry) to do things in a game that you're not practicing," Arians said, via the team's official website. "It's not fair to the quarterback either."
It's an interesting explanation by Arians. Fitzgerald's production fell off last season due to a pair of hamstring injuries. Perhaps Arians believes the entire offense suffered because Carson Palmer's best receiver was too limited on game days.
Kurt Warner relied heavily on Fitzgerald's ability to make plays even when he didn't appear to be open. Between last year's hamstring woes and this year's knee limitations, Arians and Carson Palmer have yet to establish that same level of trust.