Arizona Coach Bruce Arians said quarterback Carson Palmer was seeing another specialist Wednesday after his injured shoulder regressed following some throwing last week.
Arians said Palmer's condition is "fairly close" to being back to what it was when he first hurt the shoulder in the season-opening win over San Diego.
If Palmer's damaged nerve doesn't improve in a hurry, backup Drew Stanton will get his third straight start when the Cardinals play at Denver on Sunday.
"He's very frustrated, like we all would be," Arians said. "He wants to play and is trying to find an answer."