Palmer, 34, has missed the last two weeks with a nerve problem in his shoulder. He said the shoulder is finally responding to treatment.
"It's better. It's much, much better," Palmer said of his right shoulder.
Asked whether any one form of treatment seemed to help awaken the nerve and get it firing again, Palmer shook his head.
"It wasn't any one thing, just tons of treatment multiple times per day and it's really helped," he said. "It's way better now. It's feeling really good."
With Palmer sitting, Drew Stanton has led the Cardinals to two wins. Stanton has completed 32 of 62 passes for 411 yards, two touchdowns and no interceptions.
The Cardinals are 3-0 and have a bye in Week 4. They play the Denver Broncos on Oct. 5.
- Paul Palladino